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Finding the Fourth Proportional to 911.32, 1,257.26 and 662.10

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Solution

The fourth proportional to 911.32, 1,257.26 and 662.10 is: 913.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.32 : 1,257.26 = 662.10 : x
  2. Step 2: Convert to fraction form
    911.32/1,257.26 = 662.10/x
  3. Step 3: Cross multiply
    911.32x = 1,257.26 × 662.10
  4. Step 4: Simplify right side
    911.32x = 832,431.85
  5. Step 5: Solve for x
    x = 832,431.85/911.32
  6. Step 6: Final answer
    x = 913.44

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.