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Finding the Fourth Proportional to 323,815.74, 485,831.14 and 143,876.13

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Solution

The fourth proportional to 323,815.74, 485,831.14 and 143,876.13 is: 215,861.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,815.74 : 485,831.14 = 143,876.13 : x
  2. Step 2: Convert to fraction form
    323,815.74/485,831.14 = 143,876.13/x
  3. Step 3: Cross multiply
    323,815.74x = 485,831.14 × 143,876.13
  4. Step 4: Simplify right side
    323,815.74x = 69,899,503,897.00
  5. Step 5: Solve for x
    x = 69,899,503,897.00/323,815.74
  6. Step 6: Final answer
    x = 215,861.97

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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.