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Finding the Fourth Proportional to 1,566, 2,161.11 and 867.38

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Solution

The fourth proportional to 1,566, 2,161.11 and 867.38 is: 1,196.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,566 : 2,161.11 = 867.38 : x
  2. Step 2: Convert to fraction form
    1,566/2,161.11 = 867.38/x
  3. Step 3: Cross multiply
    1,566x = 2,161.11 × 867.38
  4. Step 4: Simplify right side
    1,566x = 1,874,492.79
  5. Step 5: Solve for x
    x = 1,874,492.79/1,566
  6. Step 6: Final answer
    x = 1,196.99

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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.