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Finding the Fourth Proportional to 331,493.20, 497,239.80 and 144,869.20

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Solution

The fourth proportional to 331,493.20, 497,239.80 and 144,869.20 is: 217,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,493.20 : 497,239.80 = 144,869.20 : x
  2. Step 2: Convert to fraction form
    331,493.20/497,239.80 = 144,869.20/x
  3. Step 3: Cross multiply
    331,493.20x = 497,239.80 × 144,869.20
  4. Step 4: Simplify right side
    331,493.20x = 72,034,732,034.16
  5. Step 5: Solve for x
    x = 72,034,732,034.16/331,493.20
  6. Step 6: Final answer
    x = 217,303.80

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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.