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Finding the Fourth Proportional to 639,437.80, 959,934.30 and 323,732.20

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Solution

The fourth proportional to 639,437.80, 959,934.30 and 323,732.20 is: 485,991.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,437.80 : 959,934.30 = 323,732.20 : x
  2. Step 2: Convert to fraction form
    639,437.80/959,934.30 = 323,732.20/x
  3. Step 3: Cross multiply
    639,437.80x = 959,934.30 × 323,732.20
  4. Step 4: Simplify right side
    639,437.80x = 310,761,642,794.46
  5. Step 5: Solve for x
    x = 310,761,642,794.46/639,437.80
  6. Step 6: Final answer
    x = 485,991.98

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1.5x scale

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.