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Finding the Fourth Proportional to 432.42, 647.82 and 335.22

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Solution

The fourth proportional to 432.42, 647.82 and 335.22 is: 502.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.42 : 647.82 = 335.22 : x
  2. Step 2: Convert to fraction form
    432.42/647.82 = 335.22/x
  3. Step 3: Cross multiply
    432.42x = 647.82 × 335.22
  4. Step 4: Simplify right side
    432.42x = 217,162.22
  5. Step 5: Solve for x
    x = 217,162.22/432.42
  6. Step 6: Final answer
    x = 502.20

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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.