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Finding the Fourth Proportional to 657,999.80, 908,031.30 and 356,193.80

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Solution

The fourth proportional to 657,999.80, 908,031.30 and 356,193.80 is: 491,542.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,999.80 : 908,031.30 = 356,193.80 : x
  2. Step 2: Convert to fraction form
    657,999.80/908,031.30 = 356,193.80/x
  3. Step 3: Cross multiply
    657,999.80x = 908,031.30 × 356,193.80
  4. Step 4: Simplify right side
    657,999.80x = 323,435,119,265.94
  5. Step 5: Solve for x
    x = 323,435,119,265.94/657,999.80
  6. Step 6: Final answer
    x = 491,542.88

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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.