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Finding the Fourth Proportional to 657,766.88, 907,721.20 and 355,960.96

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Solution

The fourth proportional to 657,766.88, 907,721.20 and 355,960.96 is: 491,227.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,766.88 : 907,721.20 = 355,960.96 : x
  2. Step 2: Convert to fraction form
    657,766.88/907,721.20 = 355,960.96/x
  3. Step 3: Cross multiply
    657,766.88x = 907,721.20 × 355,960.96
  4. Step 4: Simplify right side
    657,766.88x = 323,113,309,764.35
  5. Step 5: Solve for x
    x = 323,113,309,764.35/657,766.88
  6. Step 6: Final answer
    x = 491,227.70

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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.