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Finding the Fourth Proportional to 979.38, 1,352.61 and 760.95

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Solution

The fourth proportional to 979.38, 1,352.61 and 760.95 is: 1,050.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.38 : 1,352.61 = 760.95 : x
  2. Step 2: Convert to fraction form
    979.38/1,352.61 = 760.95/x
  3. Step 3: Cross multiply
    979.38x = 1,352.61 × 760.95
  4. Step 4: Simplify right side
    979.38x = 1,029,268.58
  5. Step 5: Solve for x
    x = 1,029,268.58/979.38
  6. Step 6: Final answer
    x = 1,050.94

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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.