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Finding the Fourth Proportional to 806.49, 1,112.81 and 474.93

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Solution

The fourth proportional to 806.49, 1,112.81 and 474.93 is: 655.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.49 : 1,112.81 = 474.93 : x
  2. Step 2: Convert to fraction form
    806.49/1,112.81 = 474.93/x
  3. Step 3: Cross multiply
    806.49x = 1,112.81 × 474.93
  4. Step 4: Simplify right side
    806.49x = 528,504.48
  5. Step 5: Solve for x
    x = 528,504.48/806.49
  6. Step 6: Final answer
    x = 655.31

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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.