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Finding the Fourth Proportional to 458,456.90, 687,652.89 and 121,490.10

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Solution

The fourth proportional to 458,456.90, 687,652.89 and 121,490.10 is: 182,226.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,456.90 : 687,652.89 = 121,490.10 : x
  2. Step 2: Convert to fraction form
    458,456.90/687,652.89 = 121,490.10/x
  3. Step 3: Cross multiply
    458,456.90x = 687,652.89 × 121,490.10
  4. Step 4: Simplify right side
    458,456.90x = 83,543,018,371.39
  5. Step 5: Solve for x
    x = 83,543,018,371.39/458,456.90
  6. Step 6: Final answer
    x = 182,226.55

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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.