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Finding the Fourth Proportional to 1,565.71, 2,160.66 and 867.10

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Solution

The fourth proportional to 1,565.71, 2,160.66 and 867.10 is: 1,196.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.71 : 2,160.66 = 867.10 : x
  2. Step 2: Convert to fraction form
    1,565.71/2,160.66 = 867.10/x
  3. Step 3: Cross multiply
    1,565.71x = 2,160.66 × 867.10
  4. Step 4: Simplify right side
    1,565.71x = 1,873,508.29
  5. Step 5: Solve for x
    x = 1,873,508.29/1,565.71
  6. Step 6: Final answer
    x = 1,196.59

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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.