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Finding the Fourth Proportional to 1,471.11, 2,208.01 and 778.29

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Solution

The fourth proportional to 1,471.11, 2,208.01 and 778.29 is: 1,168.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.11 : 2,208.01 = 778.29 : x
  2. Step 2: Convert to fraction form
    1,471.11/2,208.01 = 778.29/x
  3. Step 3: Cross multiply
    1,471.11x = 2,208.01 × 778.29
  4. Step 4: Simplify right side
    1,471.11x = 1,718,472.10
  5. Step 5: Solve for x
    x = 1,718,472.10/1,471.11
  6. Step 6: Final answer
    x = 1,168.15

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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.