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Finding the Fourth Proportional to 979.46, 1,348.60 and 925.32

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Solution

The fourth proportional to 979.46, 1,348.60 and 925.32 is: 1,274.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.46 : 1,348.60 = 925.32 : x
  2. Step 2: Convert to fraction form
    979.46/1,348.60 = 925.32/x
  3. Step 3: Cross multiply
    979.46x = 1,348.60 × 925.32
  4. Step 4: Simplify right side
    979.46x = 1,247,886.55
  5. Step 5: Solve for x
    x = 1,247,886.55/979.46
  6. Step 6: Final answer
    x = 1,274.06

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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.