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Finding the Fourth Proportional to 253.44, 349.12 and 215.98

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Solution

The fourth proportional to 253.44, 349.12 and 215.98 is: 297.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.44 : 349.12 = 215.98 : x
  2. Step 2: Convert to fraction form
    253.44/349.12 = 215.98/x
  3. Step 3: Cross multiply
    253.44x = 349.12 × 215.98
  4. Step 4: Simplify right side
    253.44x = 75,402.94
  5. Step 5: Solve for x
    x = 75,402.94/253.44
  6. Step 6: Final answer
    x = 297.52

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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.