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Finding the Fourth Proportional to 926.56, 1,380.92 and 925.12

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Solution

The fourth proportional to 926.56, 1,380.92 and 925.12 is: 1,378.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.56 : 1,380.92 = 925.12 : x
  2. Step 2: Convert to fraction form
    926.56/1,380.92 = 925.12/x
  3. Step 3: Cross multiply
    926.56x = 1,380.92 × 925.12
  4. Step 4: Simplify right side
    926.56x = 1,277,516.71
  5. Step 5: Solve for x
    x = 1,277,516.71/926.56
  6. Step 6: Final answer
    x = 1,378.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.