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Finding the Fourth Proportional to 861,497.28, 1,188,866.28 and 479,515.88

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Solution

The fourth proportional to 861,497.28, 1,188,866.28 and 479,515.88 is: 661,731.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,497.28 : 1,188,866.28 = 479,515.88 : x
  2. Step 2: Convert to fraction form
    861,497.28/1,188,866.28 = 479,515.88/x
  3. Step 3: Cross multiply
    861,497.28x = 1,188,866.28 × 479,515.88
  4. Step 4: Simplify right side
    861,497.28x = 570,080,260,456.53
  5. Step 5: Solve for x
    x = 570,080,260,456.53/861,497.28
  6. Step 6: Final answer
    x = 661,731.93

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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.