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Finding the Fourth Proportional to 509,471.10, 764,279.55 and 154,512.90

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Solution

The fourth proportional to 509,471.10, 764,279.55 and 154,512.90 is: 231,791.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,471.10 : 764,279.55 = 154,512.90 : x
  2. Step 2: Convert to fraction form
    509,471.10/764,279.55 = 154,512.90/x
  3. Step 3: Cross multiply
    509,471.10x = 764,279.55 × 154,512.90
  4. Step 4: Simplify right side
    509,471.10x = 118,091,049,681.20
  5. Step 5: Solve for x
    x = 118,091,049,681.20/509,471.10
  6. Step 6: Final answer
    x = 231,791.46

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.