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Finding the Fourth Proportional to 458,833.60, 688,347.60 and 138,959.20

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Solution

The fourth proportional to 458,833.60, 688,347.60 and 138,959.20 is: 208,468.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,833.60 : 688,347.60 = 138,959.20 : x
  2. Step 2: Convert to fraction form
    458,833.60/688,347.60 = 138,959.20/x
  3. Step 3: Cross multiply
    458,833.60x = 688,347.60 × 138,959.20
  4. Step 4: Simplify right side
    458,833.60x = 95,652,231,817.92
  5. Step 5: Solve for x
    x = 95,652,231,817.92/458,833.60
  6. Step 6: Final answer
    x = 208,468.24

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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.