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Finding the Fourth Proportional to 458,117.80, 687,695.10 and 271,234.60

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Solution

The fourth proportional to 458,117.80, 687,695.10 and 271,234.60 is: 407,158.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,117.80 : 687,695.10 = 271,234.60 : x
  2. Step 2: Convert to fraction form
    458,117.80/687,695.10 = 271,234.60/x
  3. Step 3: Cross multiply
    458,117.80x = 687,695.10 × 271,234.60
  4. Step 4: Simplify right side
    458,117.80x = 186,526,705,370.46
  5. Step 5: Solve for x
    x = 186,526,705,370.46/458,117.80
  6. Step 6: Final answer
    x = 407,158.83

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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.