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Finding the Fourth Proportional to 767.43, 1,057.85 and 703.87

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Solution

The fourth proportional to 767.43, 1,057.85 and 703.87 is: 970.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.43 : 1,057.85 = 703.87 : x
  2. Step 2: Convert to fraction form
    767.43/1,057.85 = 703.87/x
  3. Step 3: Cross multiply
    767.43x = 1,057.85 × 703.87
  4. Step 4: Simplify right side
    767.43x = 744,591.31
  5. Step 5: Solve for x
    x = 744,591.31/767.43
  6. Step 6: Final answer
    x = 970.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.