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Finding the Fourth Proportional to 912.27, 1,368.90 and 662.13

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Solution

The fourth proportional to 912.27, 1,368.90 and 662.13 is: 993.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.27 : 1,368.90 = 662.13 : x
  2. Step 2: Convert to fraction form
    912.27/1,368.90 = 662.13/x
  3. Step 3: Cross multiply
    912.27x = 1,368.90 × 662.13
  4. Step 4: Simplify right side
    912.27x = 906,389.76
  5. Step 5: Solve for x
    x = 906,389.76/912.27
  6. Step 6: Final answer
    x = 993.55

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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.