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Finding the Fourth Proportional to 1,026.68, 1,538.04 and 818.81

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Solution

The fourth proportional to 1,026.68, 1,538.04 and 818.81 is: 1,226.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.68 : 1,538.04 = 818.81 : x
  2. Step 2: Convert to fraction form
    1,026.68/1,538.04 = 818.81/x
  3. Step 3: Cross multiply
    1,026.68x = 1,538.04 × 818.81
  4. Step 4: Simplify right side
    1,026.68x = 1,259,359.07
  5. Step 5: Solve for x
    x = 1,259,359.07/1,026.68
  6. Step 6: Final answer
    x = 1,226.64

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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.