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Finding the Fourth Proportional to 1,263.50, 1,743.33 and 766.13

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Solution

The fourth proportional to 1,263.50, 1,743.33 and 766.13 is: 1,057.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.50 : 1,743.33 = 766.13 : x
  2. Step 2: Convert to fraction form
    1,263.50/1,743.33 = 766.13/x
  3. Step 3: Cross multiply
    1,263.50x = 1,743.33 × 766.13
  4. Step 4: Simplify right side
    1,263.50x = 1,335,608.70
  5. Step 5: Solve for x
    x = 1,335,608.70/1,263.50
  6. Step 6: Final answer
    x = 1,057.07

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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.