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Finding the Fourth Proportional to 1,471.25, 2,030.30 and 808.12

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Solution

The fourth proportional to 1,471.25, 2,030.30 and 808.12 is: 1,115.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.25 : 2,030.30 = 808.12 : x
  2. Step 2: Convert to fraction form
    1,471.25/2,030.30 = 808.12/x
  3. Step 3: Cross multiply
    1,471.25x = 2,030.30 × 808.12
  4. Step 4: Simplify right side
    1,471.25x = 1,640,716.92
  5. Step 5: Solve for x
    x = 1,640,716.92/1,471.25
  6. Step 6: Final answer
    x = 1,115.18

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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.