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Finding the Fourth Proportional to 292,920, 439,380.09 and 71,304

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Solution

The fourth proportional to 292,920, 439,380.09 and 71,304 is: 106,956.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,920 : 439,380.09 = 71,304 : x
  2. Step 2: Convert to fraction form
    292,920/439,380.09 = 71,304/x
  3. Step 3: Cross multiply
    292,920x = 439,380.09 × 71,304
  4. Step 4: Simplify right side
    292,920x = 31,329,557,937.36
  5. Step 5: Solve for x
    x = 31,329,557,937.36/292,920
  6. Step 6: Final answer
    x = 106,956.02

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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.