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Finding the Fourth Proportional to 1,264.80, 1,745.64 and 741.12

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Solution

The fourth proportional to 1,264.80, 1,745.64 and 741.12 is: 1,022.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.80 : 1,745.64 = 741.12 : x
  2. Step 2: Convert to fraction form
    1,264.80/1,745.64 = 741.12/x
  3. Step 3: Cross multiply
    1,264.80x = 1,745.64 × 741.12
  4. Step 4: Simplify right side
    1,264.80x = 1,293,728.72
  5. Step 5: Solve for x
    x = 1,293,728.72/1,264.80
  6. Step 6: Final answer
    x = 1,022.87

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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.