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Finding the Fourth Proportional to 806.54, 1,112.27 and 557.46

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Solution

The fourth proportional to 806.54, 1,112.27 and 557.46 is: 768.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.54 : 1,112.27 = 557.46 : x
  2. Step 2: Convert to fraction form
    806.54/1,112.27 = 557.46/x
  3. Step 3: Cross multiply
    806.54x = 1,112.27 × 557.46
  4. Step 4: Simplify right side
    806.54x = 620,043.25
  5. Step 5: Solve for x
    x = 620,043.25/806.54
  6. Step 6: Final answer
    x = 768.77

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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.