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Finding the Fourth Proportional to 767.92, 1,146.31 and 710.82

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Solution

The fourth proportional to 767.92, 1,146.31 and 710.82 is: 1,061.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.92 : 1,146.31 = 710.82 : x
  2. Step 2: Convert to fraction form
    767.92/1,146.31 = 710.82/x
  3. Step 3: Cross multiply
    767.92x = 1,146.31 × 710.82
  4. Step 4: Simplify right side
    767.92x = 814,820.07
  5. Step 5: Solve for x
    x = 814,820.07/767.92
  6. Step 6: Final answer
    x = 1,061.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.