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Finding the Fourth Proportional to 288.02, 432.12 and 125.81

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Solution

The fourth proportional to 288.02, 432.12 and 125.81 is: 188.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.02 : 432.12 = 125.81 : x
  2. Step 2: Convert to fraction form
    288.02/432.12 = 125.81/x
  3. Step 3: Cross multiply
    288.02x = 432.12 × 125.81
  4. Step 4: Simplify right side
    288.02x = 54,365.02
  5. Step 5: Solve for x
    x = 54,365.02/288.02
  6. Step 6: Final answer
    x = 188.75

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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.