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Finding the Fourth Proportional to 734.90, 1,100.41 and 515.79

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Solution

The fourth proportional to 734.90, 1,100.41 and 515.79 is: 772.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.90 : 1,100.41 = 515.79 : x
  2. Step 2: Convert to fraction form
    734.90/1,100.41 = 515.79/x
  3. Step 3: Cross multiply
    734.90x = 1,100.41 × 515.79
  4. Step 4: Simplify right side
    734.90x = 567,579.18
  5. Step 5: Solve for x
    x = 567,579.18/734.90
  6. Step 6: Final answer
    x = 772.33

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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.