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Finding the Fourth Proportional to 323,436.60, 485,077.92 and 143,423.28

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Solution

The fourth proportional to 323,436.60, 485,077.92 and 143,423.28 is: 215,100.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,436.60 : 485,077.92 = 143,423.28 : x
  2. Step 2: Convert to fraction form
    323,436.60/485,077.92 = 143,423.28/x
  3. Step 3: Cross multiply
    323,436.60x = 485,077.92 × 143,423.28
  4. Step 4: Simplify right side
    323,436.60x = 69,571,466,341.98
  5. Step 5: Solve for x
    x = 69,571,466,341.98/323,436.60
  6. Step 6: Final answer
    x = 215,100.78

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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.