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Finding the Fourth Proportional to 496.71, 688.77 and 487.80

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Solution

The fourth proportional to 496.71, 688.77 and 487.80 is: 676.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.71 : 688.77 = 487.80 : x
  2. Step 2: Convert to fraction form
    496.71/688.77 = 487.80/x
  3. Step 3: Cross multiply
    496.71x = 688.77 × 487.80
  4. Step 4: Simplify right side
    496.71x = 335,982.01
  5. Step 5: Solve for x
    x = 335,982.01/496.71
  6. Step 6: Final answer
    x = 676.41

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.