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Finding the Fourth Proportional to 662.76, 912.39 and 496.69

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Solution

The fourth proportional to 662.76, 912.39 and 496.69 is: 683.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.76 : 912.39 = 496.69 : x
  2. Step 2: Convert to fraction form
    662.76/912.39 = 496.69/x
  3. Step 3: Cross multiply
    662.76x = 912.39 × 496.69
  4. Step 4: Simplify right side
    662.76x = 453,172.88
  5. Step 5: Solve for x
    x = 453,172.88/662.76
  6. Step 6: Final answer
    x = 683.76

Related Problems

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Half scale
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Double scale
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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.