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Finding the Fourth Proportional to 391,260, 539,944.40 and 227,912.31

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Solution

The fourth proportional to 391,260, 539,944.40 and 227,912.31 is: 314,522.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,260 : 539,944.40 = 227,912.31 : x
  2. Step 2: Convert to fraction form
    391,260/539,944.40 = 227,912.31/x
  3. Step 3: Cross multiply
    391,260x = 539,944.40 × 227,912.31
  4. Step 4: Simplify right side
    391,260x = 123,059,975,475.56
  5. Step 5: Solve for x
    x = 123,059,975,475.56/391,260
  6. Step 6: Final answer
    x = 314,522.25

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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.