Home / 1,517.32-2,275.26-786.16

Finding the Fourth Proportional to 1,517.32, 2,275.26 and 786.16

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Solution

The fourth proportional to 1,517.32, 2,275.26 and 786.16 is: 1,178.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.32 : 2,275.26 = 786.16 : x
  2. Step 2: Convert to fraction form
    1,517.32/2,275.26 = 786.16/x
  3. Step 3: Cross multiply
    1,517.32x = 2,275.26 × 786.16
  4. Step 4: Simplify right side
    1,517.32x = 1,788,718.40
  5. Step 5: Solve for x
    x = 1,788,718.40/1,517.32
  6. Step 6: Final answer
    x = 1,178.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.