Home / 1,277.59-1,761.45-979.18

Finding the Fourth Proportional to 1,277.59, 1,761.45 and 979.18

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Solution

The fourth proportional to 1,277.59, 1,761.45 and 979.18 is: 1,350.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.59 : 1,761.45 = 979.18 : x
  2. Step 2: Convert to fraction form
    1,277.59/1,761.45 = 979.18/x
  3. Step 3: Cross multiply
    1,277.59x = 1,761.45 × 979.18
  4. Step 4: Simplify right side
    1,277.59x = 1,724,776.61
  5. Step 5: Solve for x
    x = 1,724,776.61/1,277.59
  6. Step 6: Final answer
    x = 1,350.02

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1.5x scale

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.