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Finding the Fourth Proportional to 806.20, 1,112.67 and 512.33

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Solution

The fourth proportional to 806.20, 1,112.67 and 512.33 is: 707.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.20 : 1,112.67 = 512.33 : x
  2. Step 2: Convert to fraction form
    806.20/1,112.67 = 512.33/x
  3. Step 3: Cross multiply
    806.20x = 1,112.67 × 512.33
  4. Step 4: Simplify right side
    806.20x = 570,048.66
  5. Step 5: Solve for x
    x = 570,048.66/806.20
  6. Step 6: Final answer
    x = 707.08

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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.