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Finding the Fourth Proportional to 1,123.03, 1,550.45 and 745.24

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Solution

The fourth proportional to 1,123.03, 1,550.45 and 745.24 is: 1,028.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.03 : 1,550.45 = 745.24 : x
  2. Step 2: Convert to fraction form
    1,123.03/1,550.45 = 745.24/x
  3. Step 3: Cross multiply
    1,123.03x = 1,550.45 × 745.24
  4. Step 4: Simplify right side
    1,123.03x = 1,155,457.36
  5. Step 5: Solve for x
    x = 1,155,457.36/1,123.03
  6. Step 6: Final answer
    x = 1,028.87

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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.