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Finding the Fourth Proportional to 272,484.28, 408,795.54 and 85,497.40

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Solution

The fourth proportional to 272,484.28, 408,795.54 and 85,497.40 is: 128,267.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,484.28 : 408,795.54 = 85,497.40 : x
  2. Step 2: Convert to fraction form
    272,484.28/408,795.54 = 85,497.40/x
  3. Step 3: Cross multiply
    272,484.28x = 408,795.54 × 85,497.40
  4. Step 4: Simplify right side
    272,484.28x = 34,950,955,801.60
  5. Step 5: Solve for x
    x = 34,950,955,801.60/272,484.28
  6. Step 6: Final answer
    x = 128,267.79

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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.