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Finding the Fourth Proportional to 240.12, 358.25 and 215.34

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Solution

The fourth proportional to 240.12, 358.25 and 215.34 is: 321.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.12 : 358.25 = 215.34 : x
  2. Step 2: Convert to fraction form
    240.12/358.25 = 215.34/x
  3. Step 3: Cross multiply
    240.12x = 358.25 × 215.34
  4. Step 4: Simplify right side
    240.12x = 77,144.48
  5. Step 5: Solve for x
    x = 77,144.48/240.12
  6. Step 6: Final answer
    x = 321.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.