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Finding the Fourth Proportional to 828.41, 1,242.63 and 443.66

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Solution

The fourth proportional to 828.41, 1,242.63 and 443.66 is: 665.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.41 : 1,242.63 = 443.66 : x
  2. Step 2: Convert to fraction form
    828.41/1,242.63 = 443.66/x
  3. Step 3: Cross multiply
    828.41x = 1,242.63 × 443.66
  4. Step 4: Simplify right side
    828.41x = 551,299.01
  5. Step 5: Solve for x
    x = 551,299.01/828.41
  6. Step 6: Final answer
    x = 665.49

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.