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Finding the Fourth Proportional to 1,118.72, 1,544.06 and 745.70

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Solution

The fourth proportional to 1,118.72, 1,544.06 and 745.70 is: 1,029.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.72 : 1,544.06 = 745.70 : x
  2. Step 2: Convert to fraction form
    1,118.72/1,544.06 = 745.70/x
  3. Step 3: Cross multiply
    1,118.72x = 1,544.06 × 745.70
  4. Step 4: Simplify right side
    1,118.72x = 1,151,405.54
  5. Step 5: Solve for x
    x = 1,151,405.54/1,118.72
  6. Step 6: Final answer
    x = 1,029.22

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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.