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Finding the Fourth Proportional to 458,291.88, 687,445.55 and 158,781.29

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Solution

The fourth proportional to 458,291.88, 687,445.55 and 158,781.29 is: 238,174.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,291.88 : 687,445.55 = 158,781.29 : x
  2. Step 2: Convert to fraction form
    458,291.88/687,445.55 = 158,781.29/x
  3. Step 3: Cross multiply
    458,291.88x = 687,445.55 × 158,781.29
  4. Step 4: Simplify right side
    458,291.88x = 109,153,487,002.63
  5. Step 5: Solve for x
    x = 109,153,487,002.63/458,291.88
  6. Step 6: Final answer
    x = 238,174.60

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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.