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Finding the Fourth Proportional to 1,358.43, 2,037.57 and 838.53

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Solution

The fourth proportional to 1,358.43, 2,037.57 and 838.53 is: 1,257.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.43 : 2,037.57 = 838.53 : x
  2. Step 2: Convert to fraction form
    1,358.43/2,037.57 = 838.53/x
  3. Step 3: Cross multiply
    1,358.43x = 2,037.57 × 838.53
  4. Step 4: Simplify right side
    1,358.43x = 1,708,563.57
  5. Step 5: Solve for x
    x = 1,708,563.57/1,358.43
  6. Step 6: Final answer
    x = 1,257.75

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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.