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Finding the Fourth Proportional to 911.74, 1,367.63 and 356.49

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Solution

The fourth proportional to 911.74, 1,367.63 and 356.49 is: 534.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.74 : 1,367.63 = 356.49 : x
  2. Step 2: Convert to fraction form
    911.74/1,367.63 = 356.49/x
  3. Step 3: Cross multiply
    911.74x = 1,367.63 × 356.49
  4. Step 4: Simplify right side
    911.74x = 487,546.42
  5. Step 5: Solve for x
    x = 487,546.42/911.74
  6. Step 6: Final answer
    x = 534.74

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.