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Finding the Fourth Proportional to 394.74, 544.91 and 247.35

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Solution

The fourth proportional to 394.74, 544.91 and 247.35 is: 341.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.74 : 544.91 = 247.35 : x
  2. Step 2: Convert to fraction form
    394.74/544.91 = 247.35/x
  3. Step 3: Cross multiply
    394.74x = 544.91 × 247.35
  4. Step 4: Simplify right side
    394.74x = 134,783.49
  5. Step 5: Solve for x
    x = 134,783.49/394.74
  6. Step 6: Final answer
    x = 341.45

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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.