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Finding the Fourth Proportional to 331,374, 496,757.28 and 129,106.56

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Solution

The fourth proportional to 331,374, 496,757.28 and 129,106.56 is: 193,541.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,374 : 496,757.28 = 129,106.56 : x
  2. Step 2: Convert to fraction form
    331,374/496,757.28 = 129,106.56/x
  3. Step 3: Cross multiply
    331,374x = 496,757.28 × 129,106.56
  4. Step 4: Simplify right side
    331,374x = 64,134,623,575.76
  5. Step 5: Solve for x
    x = 64,134,623,575.76/331,374
  6. Step 6: Final answer
    x = 193,541.51

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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.