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Finding the Fourth Proportional to 288.97, 433.47 and 83.53

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Solution

The fourth proportional to 288.97, 433.47 and 83.53 is: 125.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.97 : 433.47 = 83.53 : x
  2. Step 2: Convert to fraction form
    288.97/433.47 = 83.53/x
  3. Step 3: Cross multiply
    288.97x = 433.47 × 83.53
  4. Step 4: Simplify right side
    288.97x = 36,207.75
  5. Step 5: Solve for x
    x = 36,207.75/288.97
  6. Step 6: Final answer
    x = 125.30

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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.