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Finding the Fourth Proportional to 354.56, 489.35 and 207.27

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Solution

The fourth proportional to 354.56, 489.35 and 207.27 is: 286.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.56 : 489.35 = 207.27 : x
  2. Step 2: Convert to fraction form
    354.56/489.35 = 207.27/x
  3. Step 3: Cross multiply
    354.56x = 489.35 × 207.27
  4. Step 4: Simplify right side
    354.56x = 101,428.09
  5. Step 5: Solve for x
    x = 101,428.09/354.56
  6. Step 6: Final answer
    x = 286.07

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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.