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Finding the Fourth Proportional to 925.36, 1,389.36 and 908.96

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Solution

The fourth proportional to 925.36, 1,389.36 and 908.96 is: 1,364.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.36 : 1,389.36 = 908.96 : x
  2. Step 2: Convert to fraction form
    925.36/1,389.36 = 908.96/x
  3. Step 3: Cross multiply
    925.36x = 1,389.36 × 908.96
  4. Step 4: Simplify right side
    925.36x = 1,262,872.67
  5. Step 5: Solve for x
    x = 1,262,872.67/925.36
  6. Step 6: Final answer
    x = 1,364.74

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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.