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Finding the Fourth Proportional to 680.94, 938.39 and 494.24

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Solution

The fourth proportional to 680.94, 938.39 and 494.24 is: 681.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.94 : 938.39 = 494.24 : x
  2. Step 2: Convert to fraction form
    680.94/938.39 = 494.24/x
  3. Step 3: Cross multiply
    680.94x = 938.39 × 494.24
  4. Step 4: Simplify right side
    680.94x = 463,782.71
  5. Step 5: Solve for x
    x = 463,782.71/680.94
  6. Step 6: Final answer
    x = 681.09

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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.