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Finding the Fourth Proportional to 612.09, 918.41 and 227.25

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Solution

The fourth proportional to 612.09, 918.41 and 227.25 is: 340.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.09 : 918.41 = 227.25 : x
  2. Step 2: Convert to fraction form
    612.09/918.41 = 227.25/x
  3. Step 3: Cross multiply
    612.09x = 918.41 × 227.25
  4. Step 4: Simplify right side
    612.09x = 208,707.54
  5. Step 5: Solve for x
    x = 208,707.54/612.09
  6. Step 6: Final answer
    x = 340.98

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Half scale
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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.