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Finding the Fourth Proportional to 657,793.75, 907,755.39 and 355,987.75

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Solution

The fourth proportional to 657,793.75, 907,755.39 and 355,987.75 is: 491,263.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,793.75 : 907,755.39 = 355,987.75 : x
  2. Step 2: Convert to fraction form
    657,793.75/907,755.39 = 355,987.75/x
  3. Step 3: Cross multiply
    657,793.75x = 907,755.39 × 355,987.75
  4. Step 4: Simplify right side
    657,793.75x = 323,149,798,836.47
  5. Step 5: Solve for x
    x = 323,149,798,836.47/657,793.75
  6. Step 6: Final answer
    x = 491,263.10

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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.