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Finding the Fourth Proportional to 1,878.96, 2,818.56 and 724.68

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Solution

The fourth proportional to 1,878.96, 2,818.56 and 724.68 is: 1,087.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.96 : 2,818.56 = 724.68 : x
  2. Step 2: Convert to fraction form
    1,878.96/2,818.56 = 724.68/x
  3. Step 3: Cross multiply
    1,878.96x = 2,818.56 × 724.68
  4. Step 4: Simplify right side
    1,878.96x = 2,042,554.06
  5. Step 5: Solve for x
    x = 2,042,554.06/1,878.96
  6. Step 6: Final answer
    x = 1,087.07

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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.