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Finding the Fourth Proportional to 736.32, 1,016.16 and 421.62

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Solution

The fourth proportional to 736.32, 1,016.16 and 421.62 is: 581.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.32 : 1,016.16 = 421.62 : x
  2. Step 2: Convert to fraction form
    736.32/1,016.16 = 421.62/x
  3. Step 3: Cross multiply
    736.32x = 1,016.16 × 421.62
  4. Step 4: Simplify right side
    736.32x = 428,433.38
  5. Step 5: Solve for x
    x = 428,433.38/736.32
  6. Step 6: Final answer
    x = 581.86

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1.5x scale

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.