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Finding the Fourth Proportional to 737.12, 1,017.12 and 422.40

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Solution

The fourth proportional to 737.12, 1,017.12 and 422.40 is: 582.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.12 : 1,017.12 = 422.40 : x
  2. Step 2: Convert to fraction form
    737.12/1,017.12 = 422.40/x
  3. Step 3: Cross multiply
    737.12x = 1,017.12 × 422.40
  4. Step 4: Simplify right side
    737.12x = 429,631.49
  5. Step 5: Solve for x
    x = 429,631.49/737.12
  6. Step 6: Final answer
    x = 582.85

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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.