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Finding the Fourth Proportional to 1,123.45, 1,550.21 and 626.03

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Solution

The fourth proportional to 1,123.45, 1,550.21 and 626.03 is: 863.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.45 : 1,550.21 = 626.03 : x
  2. Step 2: Convert to fraction form
    1,123.45/1,550.21 = 626.03/x
  3. Step 3: Cross multiply
    1,123.45x = 1,550.21 × 626.03
  4. Step 4: Simplify right side
    1,123.45x = 970,467.09
  5. Step 5: Solve for x
    x = 970,467.09/1,123.45
  6. Step 6: Final answer
    x = 863.83

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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.