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Finding the Fourth Proportional to 485,497.28, 728,284.80 and 371,808.96

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Solution

The fourth proportional to 485,497.28, 728,284.80 and 371,808.96 is: 557,743.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,497.28 : 728,284.80 = 371,808.96 : x
  2. Step 2: Convert to fraction form
    485,497.28/728,284.80 = 371,808.96/x
  3. Step 3: Cross multiply
    485,497.28x = 728,284.80 × 371,808.96
  4. Step 4: Simplify right side
    485,497.28x = 270,782,814,071.81
  5. Step 5: Solve for x
    x = 270,782,814,071.81/485,497.28
  6. Step 6: Final answer
    x = 557,743.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.