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Finding the Fourth Proportional to 661,059.72, 911,951.28 and 479,373.12

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Solution

The fourth proportional to 661,059.72, 911,951.28 and 479,373.12 is: 661,309.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,059.72 : 911,951.28 = 479,373.12 : x
  2. Step 2: Convert to fraction form
    661,059.72/911,951.28 = 479,373.12/x
  3. Step 3: Cross multiply
    661,059.72x = 911,951.28 × 479,373.12
  4. Step 4: Simplify right side
    661,059.72x = 437,164,930,381.59
  5. Step 5: Solve for x
    x = 437,164,930,381.59/661,059.72
  6. Step 6: Final answer
    x = 661,309.28

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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.