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Finding the Fourth Proportional to 925.02, 1,379.39 and 916.70

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Solution

The fourth proportional to 925.02, 1,379.39 and 916.70 is: 1,366.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.02 : 1,379.39 = 916.70 : x
  2. Step 2: Convert to fraction form
    925.02/1,379.39 = 916.70/x
  3. Step 3: Cross multiply
    925.02x = 1,379.39 × 916.70
  4. Step 4: Simplify right side
    925.02x = 1,264,475.33
  5. Step 5: Solve for x
    x = 1,264,475.33/925.02
  6. Step 6: Final answer
    x = 1,366.97

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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.