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Finding the Fourth Proportional to 271.52, 407.28 and 143

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Solution

The fourth proportional to 271.52, 407.28 and 143 is: 214.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.52 : 407.28 = 143 : x
  2. Step 2: Convert to fraction form
    271.52/407.28 = 143/x
  3. Step 3: Cross multiply
    271.52x = 407.28 × 143
  4. Step 4: Simplify right side
    271.52x = 58,241.04
  5. Step 5: Solve for x
    x = 58,241.04/271.52
  6. Step 6: Final answer
    x = 214.50

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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.