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Finding the Fourth Proportional to 680.72, 939.87 and 460.08

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Solution

The fourth proportional to 680.72, 939.87 and 460.08 is: 635.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.72 : 939.87 = 460.08 : x
  2. Step 2: Convert to fraction form
    680.72/939.87 = 460.08/x
  3. Step 3: Cross multiply
    680.72x = 939.87 × 460.08
  4. Step 4: Simplify right side
    680.72x = 432,415.39
  5. Step 5: Solve for x
    x = 432,415.39/680.72
  6. Step 6: Final answer
    x = 635.24

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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.