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Finding the Fourth Proportional to 806.12, 1,112.39 and 451.98

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Solution

The fourth proportional to 806.12, 1,112.39 and 451.98 is: 623.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.12 : 1,112.39 = 451.98 : x
  2. Step 2: Convert to fraction form
    806.12/1,112.39 = 451.98/x
  3. Step 3: Cross multiply
    806.12x = 1,112.39 × 451.98
  4. Step 4: Simplify right side
    806.12x = 502,778.03
  5. Step 5: Solve for x
    x = 502,778.03/806.12
  6. Step 6: Final answer
    x = 623.70

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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.