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Finding the Fourth Proportional to 426,371.64, 639,343.52 and 141,962.01

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Solution

The fourth proportional to 426,371.64, 639,343.52 and 141,962.01 is: 212,871.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,371.64 : 639,343.52 = 141,962.01 : x
  2. Step 2: Convert to fraction form
    426,371.64/639,343.52 = 141,962.01/x
  3. Step 3: Cross multiply
    426,371.64x = 639,343.52 × 141,962.01
  4. Step 4: Simplify right side
    426,371.64x = 90,762,491,179.68
  5. Step 5: Solve for x
    x = 90,762,491,179.68/426,371.64
  6. Step 6: Final answer
    x = 212,871.78

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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.