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Finding the Fourth Proportional to 1,264.62, 1,745.20 and 740.56

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Solution

The fourth proportional to 1,264.62, 1,745.20 and 740.56 is: 1,021.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.62 : 1,745.20 = 740.56 : x
  2. Step 2: Convert to fraction form
    1,264.62/1,745.20 = 740.56/x
  3. Step 3: Cross multiply
    1,264.62x = 1,745.20 × 740.56
  4. Step 4: Simplify right side
    1,264.62x = 1,292,425.31
  5. Step 5: Solve for x
    x = 1,292,425.31/1,264.62
  6. Step 6: Final answer
    x = 1,021.99

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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.