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Finding the Fourth Proportional to 364.48, 546.78 and 121

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Solution

The fourth proportional to 364.48, 546.78 and 121 is: 181.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.48 : 546.78 = 121 : x
  2. Step 2: Convert to fraction form
    364.48/546.78 = 121/x
  3. Step 3: Cross multiply
    364.48x = 546.78 × 121
  4. Step 4: Simplify right side
    364.48x = 66,160.38
  5. Step 5: Solve for x
    x = 66,160.38/364.48
  6. Step 6: Final answer
    x = 181.52

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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.