Home / 391,176.48-539,836.38-221,406.96

Finding the Fourth Proportional to 391,176.48, 539,836.38 and 221,406.96

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Solution

The fourth proportional to 391,176.48, 539,836.38 and 221,406.96 is: 305,548.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,176.48 : 539,836.38 = 221,406.96 : x
  2. Step 2: Convert to fraction form
    391,176.48/539,836.38 = 221,406.96/x
  3. Step 3: Cross multiply
    391,176.48x = 539,836.38 × 221,406.96
  4. Step 4: Simplify right side
    391,176.48x = 119,523,531,793.21
  5. Step 5: Solve for x
    x = 119,523,531,793.21/391,176.48
  6. Step 6: Final answer
    x = 305,548.87

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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.