Home / 917,785,485.51-1,266,504,365.62-521,307,240.76

Finding the Fourth Proportional to 917,785,485.51, 1,266,504,365.62 and 521,307,240.76

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Solution

The fourth proportional to 917,785,485.51, 1,266,504,365.62 and 521,307,240.76 is: 719,381,496.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,785,485.51 : 1,266,504,365.62 = 521,307,240.76 : x
  2. Step 2: Convert to fraction form
    917,785,485.51/1,266,504,365.62 = 521,307,240.76/x
  3. Step 3: Cross multiply
    917,785,485.51x = 1,266,504,365.62 × 521,307,240.76
  4. Step 4: Simplify right side
    917,785,485.51x = 660,237,896,251,158,528
  5. Step 5: Solve for x
    x = 660,237,896,251,158,528/917,785,485.51
  6. Step 6: Final answer
    x = 719,381,496.74

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Double scale
Find fourth proportional to 917,785,486.51, 1,266,504,367 and 521,307,241.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.