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Finding the Fourth Proportional to 806.38, 1,112.82 and 457.09

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Solution

The fourth proportional to 806.38, 1,112.82 and 457.09 is: 630.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.38 : 1,112.82 = 457.09 : x
  2. Step 2: Convert to fraction form
    806.38/1,112.82 = 457.09/x
  3. Step 3: Cross multiply
    806.38x = 1,112.82 × 457.09
  4. Step 4: Simplify right side
    806.38x = 508,653.33
  5. Step 5: Solve for x
    x = 508,653.33/806.38
  6. Step 6: Final answer
    x = 630.79

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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.