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Finding the Fourth Proportional to 316,390.50, 474,487.96 and 91,767.48

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Solution

The fourth proportional to 316,390.50, 474,487.96 and 91,767.48 is: 137,622.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,390.50 : 474,487.96 = 91,767.48 : x
  2. Step 2: Convert to fraction form
    316,390.50/474,487.96 = 91,767.48/x
  3. Step 3: Cross multiply
    316,390.50x = 474,487.96 × 91,767.48
  4. Step 4: Simplify right side
    316,390.50x = 43,542,564,379.54
  5. Step 5: Solve for x
    x = 43,542,564,379.54/316,390.50
  6. Step 6: Final answer
    x = 137,622.86

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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.