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Finding the Fourth Proportional to 1,434.55, 1,979.37 and 937.92

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Solution

The fourth proportional to 1,434.55, 1,979.37 and 937.92 is: 1,294.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.55 : 1,979.37 = 937.92 : x
  2. Step 2: Convert to fraction form
    1,434.55/1,979.37 = 937.92/x
  3. Step 3: Cross multiply
    1,434.55x = 1,979.37 × 937.92
  4. Step 4: Simplify right side
    1,434.55x = 1,856,488.11
  5. Step 5: Solve for x
    x = 1,856,488.11/1,434.55
  6. Step 6: Final answer
    x = 1,294.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.