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Finding the Fourth Proportional to 431,353.30, 647,029.95 and 355,245.70

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Solution

The fourth proportional to 431,353.30, 647,029.95 and 355,245.70 is: 532,868.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,353.30 : 647,029.95 = 355,245.70 : x
  2. Step 2: Convert to fraction form
    431,353.30/647,029.95 = 355,245.70/x
  3. Step 3: Cross multiply
    431,353.30x = 647,029.95 × 355,245.70
  4. Step 4: Simplify right side
    431,353.30x = 229,854,607,508.72
  5. Step 5: Solve for x
    x = 229,854,607,508.72/431,353.30
  6. Step 6: Final answer
    x = 532,868.55

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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.