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Finding the Fourth Proportional to 382,691.20, 574,036.80 and 330,203.20

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Solution

The fourth proportional to 382,691.20, 574,036.80 and 330,203.20 is: 495,304.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,691.20 : 574,036.80 = 330,203.20 : x
  2. Step 2: Convert to fraction form
    382,691.20/574,036.80 = 330,203.20/x
  3. Step 3: Cross multiply
    382,691.20x = 574,036.80 × 330,203.20
  4. Step 4: Simplify right side
    382,691.20x = 189,548,788,277.76
  5. Step 5: Solve for x
    x = 189,548,788,277.76/382,691.20
  6. Step 6: Final answer
    x = 495,304.80

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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.