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Finding the Fourth Proportional to 288.98, 433.53 and 83.55

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Solution

The fourth proportional to 288.98, 433.53 and 83.55 is: 125.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.98 : 433.53 = 83.55 : x
  2. Step 2: Convert to fraction form
    288.98/433.53 = 83.55/x
  3. Step 3: Cross multiply
    288.98x = 433.53 × 83.55
  4. Step 4: Simplify right side
    288.98x = 36,221.43
  5. Step 5: Solve for x
    x = 36,221.43/288.98
  6. Step 6: Final answer
    x = 125.34

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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.