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Finding the Fourth Proportional to 331,008.40, 496,123.80 and 153,139.72

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Solution

The fourth proportional to 331,008.40, 496,123.80 and 153,139.72 is: 229,529.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,008.40 : 496,123.80 = 153,139.72 : x
  2. Step 2: Convert to fraction form
    331,008.40/496,123.80 = 153,139.72/x
  3. Step 3: Cross multiply
    331,008.40x = 496,123.80 × 153,139.72
  4. Step 4: Simplify right side
    331,008.40x = 75,976,259,817.34
  5. Step 5: Solve for x
    x = 75,976,259,817.34/331,008.40
  6. Step 6: Final answer
    x = 229,529.70

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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.