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Finding the Fourth Proportional to 283.08, 424.72 and 138.88

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Solution

The fourth proportional to 283.08, 424.72 and 138.88 is: 208.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.08 : 424.72 = 138.88 : x
  2. Step 2: Convert to fraction form
    283.08/424.72 = 138.88/x
  3. Step 3: Cross multiply
    283.08x = 424.72 × 138.88
  4. Step 4: Simplify right side
    283.08x = 58,985.11
  5. Step 5: Solve for x
    x = 58,985.11/283.08
  6. Step 6: Final answer
    x = 208.37

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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.