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Finding the Fourth Proportional to 321,781.20, 482,030.28 and 251,330.64

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Solution

The fourth proportional to 321,781.20, 482,030.28 and 251,330.64 is: 376,494.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,781.20 : 482,030.28 = 251,330.64 : x
  2. Step 2: Convert to fraction form
    321,781.20/482,030.28 = 251,330.64/x
  3. Step 3: Cross multiply
    321,781.20x = 482,030.28 × 251,330.64
  4. Step 4: Simplify right side
    321,781.20x = 121,148,978,771.78
  5. Step 5: Solve for x
    x = 121,148,978,771.78/321,781.20
  6. Step 6: Final answer
    x = 376,494.89

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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.