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Finding the Fourth Proportional to 1,264.08, 1,744.57 and 740.55

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Solution

The fourth proportional to 1,264.08, 1,744.57 and 740.55 is: 1,022.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.08 : 1,744.57 = 740.55 : x
  2. Step 2: Convert to fraction form
    1,264.08/1,744.57 = 740.55/x
  3. Step 3: Cross multiply
    1,264.08x = 1,744.57 × 740.55
  4. Step 4: Simplify right side
    1,264.08x = 1,291,937.61
  5. Step 5: Solve for x
    x = 1,291,937.61/1,264.08
  6. Step 6: Final answer
    x = 1,022.04

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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.