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Finding the Fourth Proportional to 1,262.54, 1,742.42 and 738.74

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Solution

The fourth proportional to 1,262.54, 1,742.42 and 738.74 is: 1,019.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.54 : 1,742.42 = 738.74 : x
  2. Step 2: Convert to fraction form
    1,262.54/1,742.42 = 738.74/x
  3. Step 3: Cross multiply
    1,262.54x = 1,742.42 × 738.74
  4. Step 4: Simplify right side
    1,262.54x = 1,287,195.35
  5. Step 5: Solve for x
    x = 1,287,195.35/1,262.54
  6. Step 6: Final answer
    x = 1,019.53

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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.