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Finding the Fourth Proportional to 426,371.90, 639,343.90 and 141,962.27

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Solution

The fourth proportional to 426,371.90, 639,343.90 and 141,962.27 is: 212,872.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,371.90 : 639,343.90 = 141,962.27 : x
  2. Step 2: Convert to fraction form
    426,371.90/639,343.90 = 141,962.27/x
  3. Step 3: Cross multiply
    426,371.90x = 639,343.90 × 141,962.27
  4. Step 4: Simplify right side
    426,371.90x = 90,762,707,803.03
  5. Step 5: Solve for x
    x = 90,762,707,803.03/426,371.90
  6. Step 6: Final answer
    x = 212,872.16

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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.