Home / 1,651.11-2,278.71-979.32

Finding the Fourth Proportional to 1,651.11, 2,278.71 and 979.32

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Solution

The fourth proportional to 1,651.11, 2,278.71 and 979.32 is: 1,351.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,651.11 : 2,278.71 = 979.32 : x
  2. Step 2: Convert to fraction form
    1,651.11/2,278.71 = 979.32/x
  3. Step 3: Cross multiply
    1,651.11x = 2,278.71 × 979.32
  4. Step 4: Simplify right side
    1,651.11x = 2,231,586.28
  5. Step 5: Solve for x
    x = 2,231,586.28/1,651.11
  6. Step 6: Final answer
    x = 1,351.57

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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.