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Finding the Fourth Proportional to 298.18, 410.43 and 215.15

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Solution

The fourth proportional to 298.18, 410.43 and 215.15 is: 296.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.18 : 410.43 = 215.15 : x
  2. Step 2: Convert to fraction form
    298.18/410.43 = 215.15/x
  3. Step 3: Cross multiply
    298.18x = 410.43 × 215.15
  4. Step 4: Simplify right side
    298.18x = 88,304.01
  5. Step 5: Solve for x
    x = 88,304.01/298.18
  6. Step 6: Final answer
    x = 296.15

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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.