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Finding the Fourth Proportional to 662,906.81, 914,781.89 and 387,290.21

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Solution

The fourth proportional to 662,906.81, 914,781.89 and 387,290.21 is: 534,443.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,906.81 : 914,781.89 = 387,290.21 : x
  2. Step 2: Convert to fraction form
    662,906.81/914,781.89 = 387,290.21/x
  3. Step 3: Cross multiply
    662,906.81x = 914,781.89 × 387,290.21
  4. Step 4: Simplify right side
    662,906.81x = 354,286,070,282.30
  5. Step 5: Solve for x
    x = 354,286,070,282.30/662,906.81
  6. Step 6: Final answer
    x = 534,443.25

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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.