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Finding the Fourth Proportional to 432,078.30, 646,951.05 and 338,766.30

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Solution

The fourth proportional to 432,078.30, 646,951.05 and 338,766.30 is: 507,234.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,078.30 : 646,951.05 = 338,766.30 : x
  2. Step 2: Convert to fraction form
    432,078.30/646,951.05 = 338,766.30/x
  3. Step 3: Cross multiply
    432,078.30x = 646,951.05 × 338,766.30
  4. Step 4: Simplify right side
    432,078.30x = 219,165,213,489.62
  5. Step 5: Solve for x
    x = 219,165,213,489.62/432,078.30
  6. Step 6: Final answer
    x = 507,234.95

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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.