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Finding the Fourth Proportional to 705.44, 971.88 and 672.64

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Solution

The fourth proportional to 705.44, 971.88 and 672.64 is: 926.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.44 : 971.88 = 672.64 : x
  2. Step 2: Convert to fraction form
    705.44/971.88 = 672.64/x
  3. Step 3: Cross multiply
    705.44x = 971.88 × 672.64
  4. Step 4: Simplify right side
    705.44x = 653,720.41
  5. Step 5: Solve for x
    x = 653,720.41/705.44
  6. Step 6: Final answer
    x = 926.68

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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.