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Finding the Fourth Proportional to 1,358.83, 2,037.32 and 865.61

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Solution

The fourth proportional to 1,358.83, 2,037.32 and 865.61 is: 1,297.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.83 : 2,037.32 = 865.61 : x
  2. Step 2: Convert to fraction form
    1,358.83/2,037.32 = 865.61/x
  3. Step 3: Cross multiply
    1,358.83x = 2,037.32 × 865.61
  4. Step 4: Simplify right side
    1,358.83x = 1,763,520.94
  5. Step 5: Solve for x
    x = 1,763,520.94/1,358.83
  6. Step 6: Final answer
    x = 1,297.82

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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.