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Finding the Fourth Proportional to 436.45, 602.31 and 239.98

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Solution

The fourth proportional to 436.45, 602.31 and 239.98 is: 331.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.45 : 602.31 = 239.98 : x
  2. Step 2: Convert to fraction form
    436.45/602.31 = 239.98/x
  3. Step 3: Cross multiply
    436.45x = 602.31 × 239.98
  4. Step 4: Simplify right side
    436.45x = 144,539.34
  5. Step 5: Solve for x
    x = 144,539.34/436.45
  6. Step 6: Final answer
    x = 331.17

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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.