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Finding the Fourth Proportional to 288.54, 432.91 and 126.34

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Solution

The fourth proportional to 288.54, 432.91 and 126.34 is: 189.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.54 : 432.91 = 126.34 : x
  2. Step 2: Convert to fraction form
    288.54/432.91 = 126.34/x
  3. Step 3: Cross multiply
    288.54x = 432.91 × 126.34
  4. Step 4: Simplify right side
    288.54x = 54,692.93
  5. Step 5: Solve for x
    x = 54,692.93/288.54
  6. Step 6: Final answer
    x = 189.55

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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.