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Finding the Fourth Proportional to 238.99, 358.67 and 102.15

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Solution

The fourth proportional to 238.99, 358.67 and 102.15 is: 153.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.99 : 358.67 = 102.15 : x
  2. Step 2: Convert to fraction form
    238.99/358.67 = 102.15/x
  3. Step 3: Cross multiply
    238.99x = 358.67 × 102.15
  4. Step 4: Simplify right side
    238.99x = 36,638.14
  5. Step 5: Solve for x
    x = 36,638.14/238.99
  6. Step 6: Final answer
    x = 153.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.