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Finding the Fourth Proportional to 662.76, 911.70 and 636.12

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Solution

The fourth proportional to 662.76, 911.70 and 636.12 is: 875.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.76 : 911.70 = 636.12 : x
  2. Step 2: Convert to fraction form
    662.76/911.70 = 636.12/x
  3. Step 3: Cross multiply
    662.76x = 911.70 × 636.12
  4. Step 4: Simplify right side
    662.76x = 579,950.60
  5. Step 5: Solve for x
    x = 579,950.60/662.76
  6. Step 6: Final answer
    x = 875.05

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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.