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Finding the Fourth Proportional to 323,719.40, 485,579.10 and 321,645.80

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Solution

The fourth proportional to 323,719.40, 485,579.10 and 321,645.80 is: 482,468.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,719.40 : 485,579.10 = 321,645.80 : x
  2. Step 2: Convert to fraction form
    323,719.40/485,579.10 = 321,645.80/x
  3. Step 3: Cross multiply
    323,719.40x = 485,579.10 × 321,645.80
  4. Step 4: Simplify right side
    323,719.40x = 156,184,478,082.78
  5. Step 5: Solve for x
    x = 156,184,478,082.78/323,719.40
  6. Step 6: Final answer
    x = 482,468.70

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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.