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Finding the Fourth Proportional to 2,289.72, 3,433.76 and 903

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Solution

The fourth proportional to 2,289.72, 3,433.76 and 903 is: 1,354.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.72 : 3,433.76 = 903 : x
  2. Step 2: Convert to fraction form
    2,289.72/3,433.76 = 903/x
  3. Step 3: Cross multiply
    2,289.72x = 3,433.76 × 903
  4. Step 4: Simplify right side
    2,289.72x = 3,100,685.28
  5. Step 5: Solve for x
    x = 3,100,685.28/2,289.72
  6. Step 6: Final answer
    x = 1,354.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.