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Finding the Fourth Proportional to 1,264.50, 1,745.33 and 712.82

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Solution

The fourth proportional to 1,264.50, 1,745.33 and 712.82 is: 983.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.50 : 1,745.33 = 712.82 : x
  2. Step 2: Convert to fraction form
    1,264.50/1,745.33 = 712.82/x
  3. Step 3: Cross multiply
    1,264.50x = 1,745.33 × 712.82
  4. Step 4: Simplify right side
    1,264.50x = 1,244,106.13
  5. Step 5: Solve for x
    x = 1,244,106.13/1,264.50
  6. Step 6: Final answer
    x = 983.87

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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.