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Finding the Fourth Proportional to 278.27, 384.01 and 153.93

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Solution

The fourth proportional to 278.27, 384.01 and 153.93 is: 212.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.27 : 384.01 = 153.93 : x
  2. Step 2: Convert to fraction form
    278.27/384.01 = 153.93/x
  3. Step 3: Cross multiply
    278.27x = 384.01 × 153.93
  4. Step 4: Simplify right side
    278.27x = 59,110.66
  5. Step 5: Solve for x
    x = 59,110.66/278.27
  6. Step 6: Final answer
    x = 212.42

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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.