Home / 727,380.09-1,003,815.67-405,090.19

Finding the Fourth Proportional to 727,380.09, 1,003,815.67 and 405,090.19

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Solution

The fourth proportional to 727,380.09, 1,003,815.67 and 405,090.19 is: 559,041.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    727,380.09 : 1,003,815.67 = 405,090.19 : x
  2. Step 2: Convert to fraction form
    727,380.09/1,003,815.67 = 405,090.19/x
  3. Step 3: Cross multiply
    727,380.09x = 1,003,815.67 × 405,090.19
  4. Step 4: Simplify right side
    727,380.09x = 406,635,878,663.63
  5. Step 5: Solve for x
    x = 406,635,878,663.63/727,380.09
  6. Step 6: Final answer
    x = 559,041.81

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Half scale
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Double scale
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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.