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Finding the Fourth Proportional to 453,689.60, 680,637.68 and 138,171.12

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Solution

The fourth proportional to 453,689.60, 680,637.68 and 138,171.12 is: 207,288.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,689.60 : 680,637.68 = 138,171.12 : x
  2. Step 2: Convert to fraction form
    453,689.60/680,637.68 = 138,171.12/x
  3. Step 3: Cross multiply
    453,689.60x = 680,637.68 × 138,171.12
  4. Step 4: Simplify right side
    453,689.60x = 94,044,470,559.80
  5. Step 5: Solve for x
    x = 94,044,470,559.80/453,689.60
  6. Step 6: Final answer
    x = 207,288.13

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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.