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Finding the Fourth Proportional to 196.58, 271.14 and 155.18

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Solution

The fourth proportional to 196.58, 271.14 and 155.18 is: 214.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.58 : 271.14 = 155.18 : x
  2. Step 2: Convert to fraction form
    196.58/271.14 = 155.18/x
  3. Step 3: Cross multiply
    196.58x = 271.14 × 155.18
  4. Step 4: Simplify right side
    196.58x = 42,075.51
  5. Step 5: Solve for x
    x = 42,075.51/196.58
  6. Step 6: Final answer
    x = 214.04

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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.