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Finding the Fourth Proportional to 357.49, 493.17 and 231.31

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Solution

The fourth proportional to 357.49, 493.17 and 231.31 is: 319.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.49 : 493.17 = 231.31 : x
  2. Step 2: Convert to fraction form
    357.49/493.17 = 231.31/x
  3. Step 3: Cross multiply
    357.49x = 493.17 × 231.31
  4. Step 4: Simplify right side
    357.49x = 114,075.15
  5. Step 5: Solve for x
    x = 114,075.15/357.49
  6. Step 6: Final answer
    x = 319.10

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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.