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Finding the Fourth Proportional to 297.72, 410.64 and 199.32

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Solution

The fourth proportional to 297.72, 410.64 and 199.32 is: 274.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.72 : 410.64 = 199.32 : x
  2. Step 2: Convert to fraction form
    297.72/410.64 = 199.32/x
  3. Step 3: Cross multiply
    297.72x = 410.64 × 199.32
  4. Step 4: Simplify right side
    297.72x = 81,848.76
  5. Step 5: Solve for x
    x = 81,848.76/297.72
  6. Step 6: Final answer
    x = 274.92

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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.