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Finding the Fourth Proportional to 353.29, 487.43 and 213.45

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Solution

The fourth proportional to 353.29, 487.43 and 213.45 is: 294.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.29 : 487.43 = 213.45 : x
  2. Step 2: Convert to fraction form
    353.29/487.43 = 213.45/x
  3. Step 3: Cross multiply
    353.29x = 487.43 × 213.45
  4. Step 4: Simplify right side
    353.29x = 104,041.67
  5. Step 5: Solve for x
    x = 104,041.67/353.29
  6. Step 6: Final answer
    x = 294.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.