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Finding the Fourth Proportional to 264.99, 398.40 and 143.49

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Solution

The fourth proportional to 264.99, 398.40 and 143.49 is: 215.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.99 : 398.40 = 143.49 : x
  2. Step 2: Convert to fraction form
    264.99/398.40 = 143.49/x
  3. Step 3: Cross multiply
    264.99x = 398.40 × 143.49
  4. Step 4: Simplify right side
    264.99x = 57,166.42
  5. Step 5: Solve for x
    x = 57,166.42/264.99
  6. Step 6: Final answer
    x = 215.73

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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.