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Finding the Fourth Proportional to 682.35, 939.76 and 680.32

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Solution

The fourth proportional to 682.35, 939.76 and 680.32 is: 936.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.35 : 939.76 = 680.32 : x
  2. Step 2: Convert to fraction form
    682.35/939.76 = 680.32/x
  3. Step 3: Cross multiply
    682.35x = 939.76 × 680.32
  4. Step 4: Simplify right side
    682.35x = 639,337.52
  5. Step 5: Solve for x
    x = 639,337.52/682.35
  6. Step 6: Final answer
    x = 936.96

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1.5x scale

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.