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Finding the Fourth Proportional to 657.88, 986.94 and 225.32

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Solution

The fourth proportional to 657.88, 986.94 and 225.32 is: 338.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.88 : 986.94 = 225.32 : x
  2. Step 2: Convert to fraction form
    657.88/986.94 = 225.32/x
  3. Step 3: Cross multiply
    657.88x = 986.94 × 225.32
  4. Step 4: Simplify right side
    657.88x = 222,377.32
  5. Step 5: Solve for x
    x = 222,377.32/657.88
  6. Step 6: Final answer
    x = 338.02

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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.