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Finding the Fourth Proportional to 391,057.44, 539,659.28 and 212,209.44

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Solution

The fourth proportional to 391,057.44, 539,659.28 and 212,209.44 is: 292,849.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,057.44 : 539,659.28 = 212,209.44 : x
  2. Step 2: Convert to fraction form
    391,057.44/539,659.28 = 212,209.44/x
  3. Step 3: Cross multiply
    391,057.44x = 539,659.28 × 212,209.44
  4. Step 4: Simplify right side
    391,057.44x = 114,520,793,599.60
  5. Step 5: Solve for x
    x = 114,520,793,599.60/391,057.44
  6. Step 6: Final answer
    x = 292,849.03

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1.5x scale

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.