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Finding the Fourth Proportional to 253.19, 348.72 and 238.30

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Solution

The fourth proportional to 253.19, 348.72 and 238.30 is: 328.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.19 : 348.72 = 238.30 : x
  2. Step 2: Convert to fraction form
    253.19/348.72 = 238.30/x
  3. Step 3: Cross multiply
    253.19x = 348.72 × 238.30
  4. Step 4: Simplify right side
    253.19x = 83,099.98
  5. Step 5: Solve for x
    x = 83,099.98/253.19
  6. Step 6: Final answer
    x = 328.21

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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.