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Finding the Fourth Proportional to 440,388.48, 660,757.76 and 140,915.20

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Solution

The fourth proportional to 440,388.48, 660,757.76 and 140,915.20 is: 211,428.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,388.48 : 660,757.76 = 140,915.20 : x
  2. Step 2: Convert to fraction form
    440,388.48/660,757.76 = 140,915.20/x
  3. Step 3: Cross multiply
    440,388.48x = 660,757.76 × 140,915.20
  4. Step 4: Simplify right side
    440,388.48x = 93,110,811,901.95
  5. Step 5: Solve for x
    x = 93,110,811,901.95/440,388.48
  6. Step 6: Final answer
    x = 211,428.81

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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.