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Finding the Fourth Proportional to 646,451.76, 969,078.96 and 330,211.20

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Solution

The fourth proportional to 646,451.76, 969,078.96 and 330,211.20 is: 495,010.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,451.76 : 969,078.96 = 330,211.20 : x
  2. Step 2: Convert to fraction form
    646,451.76/969,078.96 = 330,211.20/x
  3. Step 3: Cross multiply
    646,451.76x = 969,078.96 × 330,211.20
  4. Step 4: Simplify right side
    646,451.76x = 320,000,726,276.35
  5. Step 5: Solve for x
    x = 320,000,726,276.35/646,451.76
  6. Step 6: Final answer
    x = 495,010.99

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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.