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Finding the Fourth Proportional to 458,475.60, 687,810.60 and 138,601.20

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Solution

The fourth proportional to 458,475.60, 687,810.60 and 138,601.20 is: 207,931.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,475.60 : 687,810.60 = 138,601.20 : x
  2. Step 2: Convert to fraction form
    458,475.60/687,810.60 = 138,601.20/x
  3. Step 3: Cross multiply
    458,475.60x = 687,810.60 × 138,601.20
  4. Step 4: Simplify right side
    458,475.60x = 95,331,374,532.72
  5. Step 5: Solve for x
    x = 95,331,374,532.72/458,475.60
  6. Step 6: Final answer
    x = 207,931.18

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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.