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Finding the Fourth Proportional to 1,471.71, 2,030.98 and 808.56

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Solution

The fourth proportional to 1,471.71, 2,030.98 and 808.56 is: 1,115.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.71 : 2,030.98 = 808.56 : x
  2. Step 2: Convert to fraction form
    1,471.71/2,030.98 = 808.56/x
  3. Step 3: Cross multiply
    1,471.71x = 2,030.98 × 808.56
  4. Step 4: Simplify right side
    1,471.71x = 1,642,169.19
  5. Step 5: Solve for x
    x = 1,642,169.19/1,471.71
  6. Step 6: Final answer
    x = 1,115.82

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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.