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Finding the Fourth Proportional to 820.38, 1,132.14 and 447.33

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Solution

The fourth proportional to 820.38, 1,132.14 and 447.33 is: 617.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.38 : 1,132.14 = 447.33 : x
  2. Step 2: Convert to fraction form
    820.38/1,132.14 = 447.33/x
  3. Step 3: Cross multiply
    820.38x = 1,132.14 × 447.33
  4. Step 4: Simplify right side
    820.38x = 506,440.19
  5. Step 5: Solve for x
    x = 506,440.19/820.38
  6. Step 6: Final answer
    x = 617.32

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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.