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Finding the Fourth Proportional to 266.48, 399.48 and 144.64

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Solution

The fourth proportional to 266.48, 399.48 and 144.64 is: 216.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.48 : 399.48 = 144.64 : x
  2. Step 2: Convert to fraction form
    266.48/399.48 = 144.64/x
  3. Step 3: Cross multiply
    266.48x = 399.48 × 144.64
  4. Step 4: Simplify right side
    266.48x = 57,780.79
  5. Step 5: Solve for x
    x = 57,780.79/266.48
  6. Step 6: Final answer
    x = 216.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.