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Finding the Fourth Proportional to 395.76, 548.68 and 373.92

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Solution

The fourth proportional to 395.76, 548.68 and 373.92 is: 518.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.76 : 548.68 = 373.92 : x
  2. Step 2: Convert to fraction form
    395.76/548.68 = 373.92/x
  3. Step 3: Cross multiply
    395.76x = 548.68 × 373.92
  4. Step 4: Simplify right side
    395.76x = 205,162.43
  5. Step 5: Solve for x
    x = 205,162.43/395.76
  6. Step 6: Final answer
    x = 518.40

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.