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Finding the Fourth Proportional to 627.65, 936.36 and 611.54

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Solution

The fourth proportional to 627.65, 936.36 and 611.54 is: 912.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.65 : 936.36 = 611.54 : x
  2. Step 2: Convert to fraction form
    627.65/936.36 = 611.54/x
  3. Step 3: Cross multiply
    627.65x = 936.36 × 611.54
  4. Step 4: Simplify right side
    627.65x = 572,621.59
  5. Step 5: Solve for x
    x = 572,621.59/627.65
  6. Step 6: Final answer
    x = 912.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.