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Finding the Fourth Proportional to 1,266.73, 1,748.51 and 742.75

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Solution

The fourth proportional to 1,266.73, 1,748.51 and 742.75 is: 1,025.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.73 : 1,748.51 = 742.75 : x
  2. Step 2: Convert to fraction form
    1,266.73/1,748.51 = 742.75/x
  3. Step 3: Cross multiply
    1,266.73x = 1,748.51 × 742.75
  4. Step 4: Simplify right side
    1,266.73x = 1,298,705.80
  5. Step 5: Solve for x
    x = 1,298,705.80/1,266.73
  6. Step 6: Final answer
    x = 1,025.24

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1.5x scale

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.