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Finding the Fourth Proportional to 432.85, 648.46 and 288.27

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Solution

The fourth proportional to 432.85, 648.46 and 288.27 is: 431.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.85 : 648.46 = 288.27 : x
  2. Step 2: Convert to fraction form
    432.85/648.46 = 288.27/x
  3. Step 3: Cross multiply
    432.85x = 648.46 × 288.27
  4. Step 4: Simplify right side
    432.85x = 186,931.56
  5. Step 5: Solve for x
    x = 186,931.56/432.85
  6. Step 6: Final answer
    x = 431.86

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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.