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Finding the Fourth Proportional to 238.38, 328.88 and 145.16

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Solution

The fourth proportional to 238.38, 328.88 and 145.16 is: 200.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.38 : 328.88 = 145.16 : x
  2. Step 2: Convert to fraction form
    238.38/328.88 = 145.16/x
  3. Step 3: Cross multiply
    238.38x = 328.88 × 145.16
  4. Step 4: Simplify right side
    238.38x = 47,740.22
  5. Step 5: Solve for x
    x = 47,740.22/238.38
  6. Step 6: Final answer
    x = 200.27

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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.