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Finding the Fourth Proportional to 391,600.72, 540,435.72 and 221,836.24

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Solution

The fourth proportional to 391,600.72, 540,435.72 and 221,836.24 is: 306,149.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,600.72 : 540,435.72 = 221,836.24 : x
  2. Step 2: Convert to fraction form
    391,600.72/540,435.72 = 221,836.24/x
  3. Step 3: Cross multiply
    391,600.72x = 540,435.72 × 221,836.24
  4. Step 4: Simplify right side
    391,600.72x = 119,888,228,086.49
  5. Step 5: Solve for x
    x = 119,888,228,086.49/391,600.72
  6. Step 6: Final answer
    x = 306,149.15

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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.