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Finding the Fourth Proportional to 806.09, 1,112.55 and 474.61

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Solution

The fourth proportional to 806.09, 1,112.55 and 474.61 is: 655.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.09 : 1,112.55 = 474.61 : x
  2. Step 2: Convert to fraction form
    806.09/1,112.55 = 474.61/x
  3. Step 3: Cross multiply
    806.09x = 1,112.55 × 474.61
  4. Step 4: Simplify right side
    806.09x = 528,027.36
  5. Step 5: Solve for x
    x = 528,027.36/806.09
  6. Step 6: Final answer
    x = 655.05

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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.