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Finding the Fourth Proportional to 1,581.64, 2,182.56 and 873.48

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Solution

The fourth proportional to 1,581.64, 2,182.56 and 873.48 is: 1,205.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.64 : 2,182.56 = 873.48 : x
  2. Step 2: Convert to fraction form
    1,581.64/2,182.56 = 873.48/x
  3. Step 3: Cross multiply
    1,581.64x = 2,182.56 × 873.48
  4. Step 4: Simplify right side
    1,581.64x = 1,906,422.51
  5. Step 5: Solve for x
    x = 1,906,422.51/1,581.64
  6. Step 6: Final answer
    x = 1,205.35

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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.