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Finding the Fourth Proportional to 1,760.50, 2,640.75 and 734.50

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Solution

The fourth proportional to 1,760.50, 2,640.75 and 734.50 is: 1,101.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.50 : 2,640.75 = 734.50 : x
  2. Step 2: Convert to fraction form
    1,760.50/2,640.75 = 734.50/x
  3. Step 3: Cross multiply
    1,760.50x = 2,640.75 × 734.50
  4. Step 4: Simplify right side
    1,760.50x = 1,939,630.88
  5. Step 5: Solve for x
    x = 1,939,630.88/1,760.50
  6. Step 6: Final answer
    x = 1,101.75

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1.5x scale

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.