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Finding the Fourth Proportional to 418.77, 577.53 and 261.09

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Solution

The fourth proportional to 418.77, 577.53 and 261.09 is: 360.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.77 : 577.53 = 261.09 : x
  2. Step 2: Convert to fraction form
    418.77/577.53 = 261.09/x
  3. Step 3: Cross multiply
    418.77x = 577.53 × 261.09
  4. Step 4: Simplify right side
    418.77x = 150,787.31
  5. Step 5: Solve for x
    x = 150,787.31/418.77
  6. Step 6: Final answer
    x = 360.07

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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.