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Finding the Fourth Proportional to 395.66, 546.09 and 278.18

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Solution

The fourth proportional to 395.66, 546.09 and 278.18 is: 383.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.66 : 546.09 = 278.18 : x
  2. Step 2: Convert to fraction form
    395.66/546.09 = 278.18/x
  3. Step 3: Cross multiply
    395.66x = 546.09 × 278.18
  4. Step 4: Simplify right side
    395.66x = 151,911.32
  5. Step 5: Solve for x
    x = 151,911.32/395.66
  6. Step 6: Final answer
    x = 383.94

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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.