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Finding the Fourth Proportional to 297.64, 444.79 and 261.19

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Solution

The fourth proportional to 297.64, 444.79 and 261.19 is: 390.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.64 : 444.79 = 261.19 : x
  2. Step 2: Convert to fraction form
    297.64/444.79 = 261.19/x
  3. Step 3: Cross multiply
    297.64x = 444.79 × 261.19
  4. Step 4: Simplify right side
    297.64x = 116,174.70
  5. Step 5: Solve for x
    x = 116,174.70/297.64
  6. Step 6: Final answer
    x = 390.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.