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Finding the Fourth Proportional to 278.36, 383.82 and 223.10

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Solution

The fourth proportional to 278.36, 383.82 and 223.10 is: 307.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.36 : 383.82 = 223.10 : x
  2. Step 2: Convert to fraction form
    278.36/383.82 = 223.10/x
  3. Step 3: Cross multiply
    278.36x = 383.82 × 223.10
  4. Step 4: Simplify right side
    278.36x = 85,630.24
  5. Step 5: Solve for x
    x = 85,630.24/278.36
  6. Step 6: Final answer
    x = 307.62

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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.