Home / 1,561.20-2,153.16-1,169.16

Finding the Fourth Proportional to 1,561.20, 2,153.16 and 1,169.16

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Solution

The fourth proportional to 1,561.20, 2,153.16 and 1,169.16 is: 1,612.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.20 : 2,153.16 = 1,169.16 : x
  2. Step 2: Convert to fraction form
    1,561.20/2,153.16 = 1,169.16/x
  3. Step 3: Cross multiply
    1,561.20x = 2,153.16 × 1,169.16
  4. Step 4: Simplify right side
    1,561.20x = 2,517,388.55
  5. Step 5: Solve for x
    x = 2,517,388.55/1,561.20
  6. Step 6: Final answer
    x = 1,612.47

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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.