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Finding the Fourth Proportional to 705.74, 974.39 and 440.28

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Solution

The fourth proportional to 705.74, 974.39 and 440.28 is: 607.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.74 : 974.39 = 440.28 : x
  2. Step 2: Convert to fraction form
    705.74/974.39 = 440.28/x
  3. Step 3: Cross multiply
    705.74x = 974.39 × 440.28
  4. Step 4: Simplify right side
    705.74x = 429,002.23
  5. Step 5: Solve for x
    x = 429,002.23/705.74
  6. Step 6: Final answer
    x = 607.88

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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.