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Finding the Fourth Proportional to 436.42, 602.33 and 261.80

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Solution

The fourth proportional to 436.42, 602.33 and 261.80 is: 361.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.42 : 602.33 = 261.80 : x
  2. Step 2: Convert to fraction form
    436.42/602.33 = 261.80/x
  3. Step 3: Cross multiply
    436.42x = 602.33 × 261.80
  4. Step 4: Simplify right side
    436.42x = 157,689.99
  5. Step 5: Solve for x
    x = 157,689.99/436.42
  6. Step 6: Final answer
    x = 361.33

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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.