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Finding the Fourth Proportional to 486.28, 729.54 and 432.58

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Solution

The fourth proportional to 486.28, 729.54 and 432.58 is: 648.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.28 : 729.54 = 432.58 : x
  2. Step 2: Convert to fraction form
    486.28/729.54 = 432.58/x
  3. Step 3: Cross multiply
    486.28x = 729.54 × 432.58
  4. Step 4: Simplify right side
    486.28x = 315,584.41
  5. Step 5: Solve for x
    x = 315,584.41/486.28
  6. Step 6: Final answer
    x = 648.98

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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.