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Finding the Fourth Proportional to 809.73, 1,117.42 and 495.54

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Solution

The fourth proportional to 809.73, 1,117.42 and 495.54 is: 683.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.73 : 1,117.42 = 495.54 : x
  2. Step 2: Convert to fraction form
    809.73/1,117.42 = 495.54/x
  3. Step 3: Cross multiply
    809.73x = 1,117.42 × 495.54
  4. Step 4: Simplify right side
    809.73x = 553,725.07
  5. Step 5: Solve for x
    x = 553,725.07/809.73
  6. Step 6: Final answer
    x = 683.84

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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.