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Finding the Fourth Proportional to 1,838.82, 2,756.86 and 865.61

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Solution

The fourth proportional to 1,838.82, 2,756.86 and 865.61 is: 1,297.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,838.82 : 2,756.86 = 865.61 : x
  2. Step 2: Convert to fraction form
    1,838.82/2,756.86 = 865.61/x
  3. Step 3: Cross multiply
    1,838.82x = 2,756.86 × 865.61
  4. Step 4: Simplify right side
    1,838.82x = 2,386,349.64
  5. Step 5: Solve for x
    x = 2,386,349.64/1,838.82
  6. Step 6: Final answer
    x = 1,297.76

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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.