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Finding the Fourth Proportional to 486,963.80, 729,948.90 and 329,208.20

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Solution

The fourth proportional to 486,963.80, 729,948.90 and 329,208.20 is: 493,476.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,963.80 : 729,948.90 = 329,208.20 : x
  2. Step 2: Convert to fraction form
    486,963.80/729,948.90 = 329,208.20/x
  3. Step 3: Cross multiply
    486,963.80x = 729,948.90 × 329,208.20
  4. Step 4: Simplify right side
    486,963.80x = 240,305,163,460.98
  5. Step 5: Solve for x
    x = 240,305,163,460.98/486,963.80
  6. Step 6: Final answer
    x = 493,476.44

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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.