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Finding the Fourth Proportional to 639,491.20, 960,662.40 and 534,515.20

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Solution

The fourth proportional to 639,491.20, 960,662.40 and 534,515.20 is: 802,964.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,491.20 : 960,662.40 = 534,515.20 : x
  2. Step 2: Convert to fraction form
    639,491.20/960,662.40 = 534,515.20/x
  3. Step 3: Cross multiply
    639,491.20x = 960,662.40 × 534,515.20
  4. Step 4: Simplify right side
    639,491.20x = 513,488,654,868.48
  5. Step 5: Solve for x
    x = 513,488,654,868.48/639,491.20
  6. Step 6: Final answer
    x = 802,964.38

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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.