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Finding the Fourth Proportional to 238.10, 328.50 and 134.60

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Solution

The fourth proportional to 238.10, 328.50 and 134.60 is: 185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.10 : 328.50 = 134.60 : x
  2. Step 2: Convert to fraction form
    238.10/328.50 = 134.60/x
  3. Step 3: Cross multiply
    238.10x = 328.50 × 134.60
  4. Step 4: Simplify right side
    238.10x = 44,216.10
  5. Step 5: Solve for x
    x = 44,216.10/238.10
  6. Step 6: Final answer
    x = 185.70

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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.