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Finding the Fourth Proportional to 867.94, 1,300.39 and 765.88

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Solution

The fourth proportional to 867.94, 1,300.39 and 765.88 is: 1,147.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.94 : 1,300.39 = 765.88 : x
  2. Step 2: Convert to fraction form
    867.94/1,300.39 = 765.88/x
  3. Step 3: Cross multiply
    867.94x = 1,300.39 × 765.88
  4. Step 4: Simplify right side
    867.94x = 995,937.53
  5. Step 5: Solve for x
    x = 995,937.53/867.94
  6. Step 6: Final answer
    x = 1,147.48

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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.