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Finding the Fourth Proportional to 705.38, 973.42 and 394.88

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Solution

The fourth proportional to 705.38, 973.42 and 394.88 is: 544.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.38 : 973.42 = 394.88 : x
  2. Step 2: Convert to fraction form
    705.38/973.42 = 394.88/x
  3. Step 3: Cross multiply
    705.38x = 973.42 × 394.88
  4. Step 4: Simplify right side
    705.38x = 384,378.24
  5. Step 5: Solve for x
    x = 384,378.24/705.38
  6. Step 6: Final answer
    x = 544.93

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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.