Home / 1,581.11-2,181.37-951.15

Finding the Fourth Proportional to 1,581.11, 2,181.37 and 951.15

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Solution

The fourth proportional to 1,581.11, 2,181.37 and 951.15 is: 1,312.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.11 : 2,181.37 = 951.15 : x
  2. Step 2: Convert to fraction form
    1,581.11/2,181.37 = 951.15/x
  3. Step 3: Cross multiply
    1,581.11x = 2,181.37 × 951.15
  4. Step 4: Simplify right side
    1,581.11x = 2,074,810.08
  5. Step 5: Solve for x
    x = 2,074,810.08/1,581.11
  6. Step 6: Final answer
    x = 1,312.25

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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.