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Finding the Fourth Proportional to 318,045.20, 476,619.48 and 251,190.80

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Solution

The fourth proportional to 318,045.20, 476,619.48 and 251,190.80 is: 376,432.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,045.20 : 476,619.48 = 251,190.80 : x
  2. Step 2: Convert to fraction form
    318,045.20/476,619.48 = 251,190.80/x
  3. Step 3: Cross multiply
    318,045.20x = 476,619.48 × 251,190.80
  4. Step 4: Simplify right side
    318,045.20x = 119,722,428,476.78
  5. Step 5: Solve for x
    x = 119,722,428,476.78/318,045.20
  6. Step 6: Final answer
    x = 376,432.12

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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.