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Finding the Fourth Proportional to 647,442.10, 971,163.15 and 423,493.30

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Solution

The fourth proportional to 647,442.10, 971,163.15 and 423,493.30 is: 635,239.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,442.10 : 971,163.15 = 423,493.30 : x
  2. Step 2: Convert to fraction form
    647,442.10/971,163.15 = 423,493.30/x
  3. Step 3: Cross multiply
    647,442.10x = 971,163.15 × 423,493.30
  4. Step 4: Simplify right side
    647,442.10x = 411,281,087,231.90
  5. Step 5: Solve for x
    x = 411,281,087,231.90/647,442.10
  6. Step 6: Final answer
    x = 635,239.95

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Similar ratio
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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.