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Finding the Fourth Proportional to 271.84, 407.80 and 143.60

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Solution

The fourth proportional to 271.84, 407.80 and 143.60 is: 215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.84 : 407.80 = 143.60 : x
  2. Step 2: Convert to fraction form
    271.84/407.80 = 143.60/x
  3. Step 3: Cross multiply
    271.84x = 407.80 × 143.60
  4. Step 4: Simplify right side
    271.84x = 58,560.08
  5. Step 5: Solve for x
    x = 58,560.08/271.84
  6. Step 6: Final answer
    x = 215.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.