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Finding the Fourth Proportional to 210,491.92, 315,787.19 and 143,963.38

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Solution

The fourth proportional to 210,491.92, 315,787.19 and 143,963.38 is: 215,978.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,491.92 : 315,787.19 = 143,963.38 : x
  2. Step 2: Convert to fraction form
    210,491.92/315,787.19 = 143,963.38/x
  3. Step 3: Cross multiply
    210,491.92x = 315,787.19 × 143,963.38
  4. Step 4: Simplify right side
    210,491.92x = 45,461,791,233.10
  5. Step 5: Solve for x
    x = 45,461,791,233.10/210,491.92
  6. Step 6: Final answer
    x = 215,978.79

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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.