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Finding the Fourth Proportional to 767.79, 1,151.82 and 247.91

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Solution

The fourth proportional to 767.79, 1,151.82 and 247.91 is: 371.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.79 : 1,151.82 = 247.91 : x
  2. Step 2: Convert to fraction form
    767.79/1,151.82 = 247.91/x
  3. Step 3: Cross multiply
    767.79x = 1,151.82 × 247.91
  4. Step 4: Simplify right side
    767.79x = 285,547.70
  5. Step 5: Solve for x
    x = 285,547.70/767.79
  6. Step 6: Final answer
    x = 371.91

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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.