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Finding the Fourth Proportional to 364.84, 547.42 and 121.40

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Solution

The fourth proportional to 364.84, 547.42 and 121.40 is: 182.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.84 : 547.42 = 121.40 : x
  2. Step 2: Convert to fraction form
    364.84/547.42 = 121.40/x
  3. Step 3: Cross multiply
    364.84x = 547.42 × 121.40
  4. Step 4: Simplify right side
    364.84x = 66,456.79
  5. Step 5: Solve for x
    x = 66,456.79/364.84
  6. Step 6: Final answer
    x = 182.15

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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.