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Finding the Fourth Proportional to 934.17, 1,391.49 and 892.05

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Solution

The fourth proportional to 934.17, 1,391.49 and 892.05 is: 1,328.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.17 : 1,391.49 = 892.05 : x
  2. Step 2: Convert to fraction form
    934.17/1,391.49 = 892.05/x
  3. Step 3: Cross multiply
    934.17x = 1,391.49 × 892.05
  4. Step 4: Simplify right side
    934.17x = 1,241,278.65
  5. Step 5: Solve for x
    x = 1,241,278.65/934.17
  6. Step 6: Final answer
    x = 1,328.75

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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.