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Finding the Fourth Proportional to 238.36, 328.60 and 176.20

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Solution

The fourth proportional to 238.36, 328.60 and 176.20 is: 242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.36 : 328.60 = 176.20 : x
  2. Step 2: Convert to fraction form
    238.36/328.60 = 176.20/x
  3. Step 3: Cross multiply
    238.36x = 328.60 × 176.20
  4. Step 4: Simplify right side
    238.36x = 57,899.32
  5. Step 5: Solve for x
    x = 57,899.32/238.36
  6. Step 6: Final answer
    x = 242.91

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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.