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Finding the Fourth Proportional to 1,144.08, 1,578.57 and 745.70

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Solution

The fourth proportional to 1,144.08, 1,578.57 and 745.70 is: 1,028.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.08 : 1,578.57 = 745.70 : x
  2. Step 2: Convert to fraction form
    1,144.08/1,578.57 = 745.70/x
  3. Step 3: Cross multiply
    1,144.08x = 1,578.57 × 745.70
  4. Step 4: Simplify right side
    1,144.08x = 1,177,131.76
  5. Step 5: Solve for x
    x = 1,177,131.76/1,144.08
  6. Step 6: Final answer
    x = 1,028.89

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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.