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Finding the Fourth Proportional to 736.30, 1,016.31 and 487.81

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Solution

The fourth proportional to 736.30, 1,016.31 and 487.81 is: 673.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.30 : 1,016.31 = 487.81 : x
  2. Step 2: Convert to fraction form
    736.30/1,016.31 = 487.81/x
  3. Step 3: Cross multiply
    736.30x = 1,016.31 × 487.81
  4. Step 4: Simplify right side
    736.30x = 495,766.18
  5. Step 5: Solve for x
    x = 495,766.18/736.30
  6. Step 6: Final answer
    x = 673.32

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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.