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Finding the Fourth Proportional to 904.56, 1,247.87 and 531.42

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Solution

The fourth proportional to 904.56, 1,247.87 and 531.42 is: 733.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.56 : 1,247.87 = 531.42 : x
  2. Step 2: Convert to fraction form
    904.56/1,247.87 = 531.42/x
  3. Step 3: Cross multiply
    904.56x = 1,247.87 × 531.42
  4. Step 4: Simplify right side
    904.56x = 663,143.08
  5. Step 5: Solve for x
    x = 663,143.08/904.56
  6. Step 6: Final answer
    x = 733.11

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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.