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Finding the Fourth Proportional to 390,625.20, 585,937.80 and 141,248.88

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Solution

The fourth proportional to 390,625.20, 585,937.80 and 141,248.88 is: 211,873.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,625.20 : 585,937.80 = 141,248.88 : x
  2. Step 2: Convert to fraction form
    390,625.20/585,937.80 = 141,248.88/x
  3. Step 3: Cross multiply
    390,625.20x = 585,937.80 × 141,248.88
  4. Step 4: Simplify right side
    390,625.20x = 82,763,057,999.66
  5. Step 5: Solve for x
    x = 82,763,057,999.66/390,625.20
  6. Step 6: Final answer
    x = 211,873.32

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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.