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Finding the Fourth Proportional to 391,479.68, 587,307.08 and 125,256.14

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Solution

The fourth proportional to 391,479.68, 587,307.08 and 125,256.14 is: 187,912.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,479.68 : 587,307.08 = 125,256.14 : x
  2. Step 2: Convert to fraction form
    391,479.68/587,307.08 = 125,256.14/x
  3. Step 3: Cross multiply
    391,479.68x = 587,307.08 × 125,256.14
  4. Step 4: Simplify right side
    391,479.68x = 73,563,815,212.08
  5. Step 5: Solve for x
    x = 73,563,815,212.08/391,479.68
  6. Step 6: Final answer
    x = 187,912.22

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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.