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Finding the Fourth Proportional to 900, 1,242.03 and 550.62

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Solution

The fourth proportional to 900, 1,242.03 and 550.62 is: 759.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    900 : 1,242.03 = 550.62 : x
  2. Step 2: Convert to fraction form
    900/1,242.03 = 550.62/x
  3. Step 3: Cross multiply
    900x = 1,242.03 × 550.62
  4. Step 4: Simplify right side
    900x = 683,886.56
  5. Step 5: Solve for x
    x = 683,886.56/900
  6. Step 6: Final answer
    x = 759.87

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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.