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Finding the Fourth Proportional to 735.20, 1,015.74 and 676.88

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Solution

The fourth proportional to 735.20, 1,015.74 and 676.88 is: 935.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.20 : 1,015.74 = 676.88 : x
  2. Step 2: Convert to fraction form
    735.20/1,015.74 = 676.88/x
  3. Step 3: Cross multiply
    735.20x = 1,015.74 × 676.88
  4. Step 4: Simplify right side
    735.20x = 687,534.09
  5. Step 5: Solve for x
    x = 687,534.09/735.20
  6. Step 6: Final answer
    x = 935.17

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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.