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Finding the Fourth Proportional to 1,878.59, 2,818.25 and 724.25

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Solution

The fourth proportional to 1,878.59, 2,818.25 and 724.25 is: 1,086.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.59 : 2,818.25 = 724.25 : x
  2. Step 2: Convert to fraction form
    1,878.59/2,818.25 = 724.25/x
  3. Step 3: Cross multiply
    1,878.59x = 2,818.25 × 724.25
  4. Step 4: Simplify right side
    1,878.59x = 2,041,117.56
  5. Step 5: Solve for x
    x = 2,041,117.56/1,878.59
  6. Step 6: Final answer
    x = 1,086.52

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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.