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Finding the Fourth Proportional to 427.76, 590.02 and 261.76

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Solution

The fourth proportional to 427.76, 590.02 and 261.76 is: 361.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.76 : 590.02 = 261.76 : x
  2. Step 2: Convert to fraction form
    427.76/590.02 = 261.76/x
  3. Step 3: Cross multiply
    427.76x = 590.02 × 261.76
  4. Step 4: Simplify right side
    427.76x = 154,442.33
  5. Step 5: Solve for x
    x = 154,442.33/427.76
  6. Step 6: Final answer
    x = 361.05

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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.