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Finding the Fourth Proportional to 453,128.40, 679,693.68 and 137,587.68

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Solution

The fourth proportional to 453,128.40, 679,693.68 and 137,587.68 is: 206,381.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,128.40 : 679,693.68 = 137,587.68 : x
  2. Step 2: Convert to fraction form
    453,128.40/679,693.68 = 137,587.68/x
  3. Step 3: Cross multiply
    453,128.40x = 679,693.68 × 137,587.68
  4. Step 4: Simplify right side
    453,128.40x = 93,517,476,541.86
  5. Step 5: Solve for x
    x = 93,517,476,541.86/453,128.40
  6. Step 6: Final answer
    x = 206,381.85

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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.