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Finding the Fourth Proportional to 618.51, 927.87 and 310.31

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Solution

The fourth proportional to 618.51, 927.87 and 310.31 is: 465.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.51 : 927.87 = 310.31 : x
  2. Step 2: Convert to fraction form
    618.51/927.87 = 310.31/x
  3. Step 3: Cross multiply
    618.51x = 927.87 × 310.31
  4. Step 4: Simplify right side
    618.51x = 287,922.70
  5. Step 5: Solve for x
    x = 287,922.70/618.51
  6. Step 6: Final answer
    x = 465.51

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.