Home / 776,855.21-1,072,089.14-428,009.79

Finding the Fourth Proportional to 776,855.21, 1,072,089.14 and 428,009.79

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Solution

The fourth proportional to 776,855.21, 1,072,089.14 and 428,009.79 is: 590,669.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,855.21 : 1,072,089.14 = 428,009.79 : x
  2. Step 2: Convert to fraction form
    776,855.21/1,072,089.14 = 428,009.79/x
  3. Step 3: Cross multiply
    776,855.21x = 1,072,089.14 × 428,009.79
  4. Step 4: Simplify right side
    776,855.21x = 458,864,643,522.47
  5. Step 5: Solve for x
    x = 458,864,643,522.47/776,855.21
  6. Step 6: Final answer
    x = 590,669.46

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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.