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Finding the Fourth Proportional to 329,643.20, 494,248.80 and 129,843.20

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Solution

The fourth proportional to 329,643.20, 494,248.80 and 129,843.20 is: 194,679.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,643.20 : 494,248.80 = 129,843.20 : x
  2. Step 2: Convert to fraction form
    329,643.20/494,248.80 = 129,843.20/x
  3. Step 3: Cross multiply
    329,643.20x = 494,248.80 × 129,843.20
  4. Step 4: Simplify right side
    329,643.20x = 64,174,845,788.16
  5. Step 5: Solve for x
    x = 64,174,845,788.16/329,643.20
  6. Step 6: Final answer
    x = 194,679.72

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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.