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Finding the Fourth Proportional to 1,255.76, 1,882.30 and 475.40

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Solution

The fourth proportional to 1,255.76, 1,882.30 and 475.40 is: 712.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.76 : 1,882.30 = 475.40 : x
  2. Step 2: Convert to fraction form
    1,255.76/1,882.30 = 475.40/x
  3. Step 3: Cross multiply
    1,255.76x = 1,882.30 × 475.40
  4. Step 4: Simplify right side
    1,255.76x = 894,845.42
  5. Step 5: Solve for x
    x = 894,845.42/1,255.76
  6. Step 6: Final answer
    x = 712.59

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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.