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Finding the Fourth Proportional to 900.08, 1,242.08 and 550.72

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Solution

The fourth proportional to 900.08, 1,242.08 and 550.72 is: 759.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.08 : 1,242.08 = 550.72 : x
  2. Step 2: Convert to fraction form
    900.08/1,242.08 = 550.72/x
  3. Step 3: Cross multiply
    900.08x = 1,242.08 × 550.72
  4. Step 4: Simplify right side
    900.08x = 684,038.30
  5. Step 5: Solve for x
    x = 684,038.30/900.08
  6. Step 6: Final answer
    x = 759.97

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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.