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Finding the Fourth Proportional to 934.16, 1,398.60 and 925.65

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Solution

The fourth proportional to 934.16, 1,398.60 and 925.65 is: 1,385.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.16 : 1,398.60 = 925.65 : x
  2. Step 2: Convert to fraction form
    934.16/1,398.60 = 925.65/x
  3. Step 3: Cross multiply
    934.16x = 1,398.60 × 925.65
  4. Step 4: Simplify right side
    934.16x = 1,294,614.09
  5. Step 5: Solve for x
    x = 1,294,614.09/934.16
  6. Step 6: Final answer
    x = 1,385.87

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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.