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Finding the Fourth Proportional to 391,469.68, 540,211.62 and 228,141.64

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Solution

The fourth proportional to 391,469.68, 540,211.62 and 228,141.64 is: 314,825.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,469.68 : 540,211.62 = 228,141.64 : x
  2. Step 2: Convert to fraction form
    391,469.68/540,211.62 = 228,141.64/x
  3. Step 3: Cross multiply
    391,469.68x = 540,211.62 × 228,141.64
  4. Step 4: Simplify right side
    391,469.68x = 123,244,764,933.86
  5. Step 5: Solve for x
    x = 123,244,764,933.86/391,469.68
  6. Step 6: Final answer
    x = 314,825.82

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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.