Home / 391,121.21-539,747.48-212,273.21

Finding the Fourth Proportional to 391,121.21, 539,747.48 and 212,273.21

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Solution

The fourth proportional to 391,121.21, 539,747.48 and 212,273.21 is: 292,937.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,121.21 : 539,747.48 = 212,273.21 : x
  2. Step 2: Convert to fraction form
    391,121.21/539,747.48 = 212,273.21/x
  3. Step 3: Cross multiply
    391,121.21x = 539,747.48 × 212,273.21
  4. Step 4: Simplify right side
    391,121.21x = 114,573,928,000.96
  5. Step 5: Solve for x
    x = 114,573,928,000.96/391,121.21
  6. Step 6: Final answer
    x = 292,937.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.