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Finding the Fourth Proportional to 238.07, 328.47 and 143.57

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Solution

The fourth proportional to 238.07, 328.47 and 143.57 is: 198.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.07 : 328.47 = 143.57 : x
  2. Step 2: Convert to fraction form
    238.07/328.47 = 143.57/x
  3. Step 3: Cross multiply
    238.07x = 328.47 × 143.57
  4. Step 4: Simplify right side
    238.07x = 47,159.26
  5. Step 5: Solve for x
    x = 47,159.26/238.07
  6. Step 6: Final answer
    x = 198.09

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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.