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Finding the Fourth Proportional to 354.28, 489.54 and 277.24

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Solution

The fourth proportional to 354.28, 489.54 and 277.24 is: 383.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.28 : 489.54 = 277.24 : x
  2. Step 2: Convert to fraction form
    354.28/489.54 = 277.24/x
  3. Step 3: Cross multiply
    354.28x = 489.54 × 277.24
  4. Step 4: Simplify right side
    354.28x = 135,720.07
  5. Step 5: Solve for x
    x = 135,720.07/354.28
  6. Step 6: Final answer
    x = 383.09

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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.