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Finding the Fourth Proportional to 639,456.70, 959,622.45 and 355,146.70

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Solution

The fourth proportional to 639,456.70, 959,622.45 and 355,146.70 is: 532,962.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,456.70 : 959,622.45 = 355,146.70 : x
  2. Step 2: Convert to fraction form
    639,456.70/959,622.45 = 355,146.70/x
  3. Step 3: Cross multiply
    639,456.70x = 959,622.45 × 355,146.70
  4. Step 4: Simplify right side
    639,456.70x = 340,806,746,363.42
  5. Step 5: Solve for x
    x = 340,806,746,363.42/639,456.70
  6. Step 6: Final answer
    x = 532,962.98

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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.