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Finding the Fourth Proportional to 418.20, 577.22 and 278.24

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Solution

The fourth proportional to 418.20, 577.22 and 278.24 is: 384.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.20 : 577.22 = 278.24 : x
  2. Step 2: Convert to fraction form
    418.20/577.22 = 278.24/x
  3. Step 3: Cross multiply
    418.20x = 577.22 × 278.24
  4. Step 4: Simplify right side
    418.20x = 160,605.69
  5. Step 5: Solve for x
    x = 160,605.69/418.20
  6. Step 6: Final answer
    x = 384.04

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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.