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Finding the Fourth Proportional to 1,838.69, 2,759.25 and 864.87

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Solution

The fourth proportional to 1,838.69, 2,759.25 and 864.87 is: 1,297.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,838.69 : 2,759.25 = 864.87 : x
  2. Step 2: Convert to fraction form
    1,838.69/2,759.25 = 864.87/x
  3. Step 3: Cross multiply
    1,838.69x = 2,759.25 × 864.87
  4. Step 4: Simplify right side
    1,838.69x = 2,386,392.55
  5. Step 5: Solve for x
    x = 2,386,392.55/1,838.69
  6. Step 6: Final answer
    x = 1,297.88

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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.