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Finding the Fourth Proportional to 576.09, 863.60 and 432.45

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Solution

The fourth proportional to 576.09, 863.60 and 432.45 is: 648.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.09 : 863.60 = 432.45 : x
  2. Step 2: Convert to fraction form
    576.09/863.60 = 432.45/x
  3. Step 3: Cross multiply
    576.09x = 863.60 × 432.45
  4. Step 4: Simplify right side
    576.09x = 373,461.66
  5. Step 5: Solve for x
    x = 373,461.66/576.09
  6. Step 6: Final answer
    x = 648.27

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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.