Home / 1,515.66-2,091.47-926.79

Finding the Fourth Proportional to 1,515.66, 2,091.47 and 926.79

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Solution

The fourth proportional to 1,515.66, 2,091.47 and 926.79 is: 1,278.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.66 : 2,091.47 = 926.79 : x
  2. Step 2: Convert to fraction form
    1,515.66/2,091.47 = 926.79/x
  3. Step 3: Cross multiply
    1,515.66x = 2,091.47 × 926.79
  4. Step 4: Simplify right side
    1,515.66x = 1,938,348.85
  5. Step 5: Solve for x
    x = 1,938,348.85/1,515.66
  6. Step 6: Final answer
    x = 1,278.88

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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.