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Finding the Fourth Proportional to 2,191.82, 3,287.12 and 875.57

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Solution

The fourth proportional to 2,191.82, 3,287.12 and 875.57 is: 1,313.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.82 : 3,287.12 = 875.57 : x
  2. Step 2: Convert to fraction form
    2,191.82/3,287.12 = 875.57/x
  3. Step 3: Cross multiply
    2,191.82x = 3,287.12 × 875.57
  4. Step 4: Simplify right side
    2,191.82x = 2,878,082.84
  5. Step 5: Solve for x
    x = 2,878,082.84/2,191.82
  6. Step 6: Final answer
    x = 1,313.10

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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.