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Finding the Fourth Proportional to 912.26, 1,369.28 and 615.73

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Solution

The fourth proportional to 912.26, 1,369.28 and 615.73 is: 924.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.26 : 1,369.28 = 615.73 : x
  2. Step 2: Convert to fraction form
    912.26/1,369.28 = 615.73/x
  3. Step 3: Cross multiply
    912.26x = 1,369.28 × 615.73
  4. Step 4: Simplify right side
    912.26x = 843,104.89
  5. Step 5: Solve for x
    x = 843,104.89/912.26
  6. Step 6: Final answer
    x = 924.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.