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Finding the Fourth Proportional to 436.48, 602.36 and 261.88

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Solution

The fourth proportional to 436.48, 602.36 and 261.88 is: 361.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.48 : 602.36 = 261.88 : x
  2. Step 2: Convert to fraction form
    436.48/602.36 = 261.88/x
  3. Step 3: Cross multiply
    436.48x = 602.36 × 261.88
  4. Step 4: Simplify right side
    436.48x = 157,744.73
  5. Step 5: Solve for x
    x = 157,744.73/436.48
  6. Step 6: Final answer
    x = 361.40

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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.