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Finding the Fourth Proportional to 736.38, 1,016.16 and 421.68

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Solution

The fourth proportional to 736.38, 1,016.16 and 421.68 is: 581.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.38 : 1,016.16 = 421.68 : x
  2. Step 2: Convert to fraction form
    736.38/1,016.16 = 421.68/x
  3. Step 3: Cross multiply
    736.38x = 1,016.16 × 421.68
  4. Step 4: Simplify right side
    736.38x = 428,494.35
  5. Step 5: Solve for x
    x = 428,494.35/736.38
  6. Step 6: Final answer
    x = 581.89

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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.