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Finding the Fourth Proportional to 612.75, 919.13 and 270.75

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Solution

The fourth proportional to 612.75, 919.13 and 270.75 is: 406.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.75 : 919.13 = 270.75 : x
  2. Step 2: Convert to fraction form
    612.75/919.13 = 270.75/x
  3. Step 3: Cross multiply
    612.75x = 919.13 × 270.75
  4. Step 4: Simplify right side
    612.75x = 248,853.09
  5. Step 5: Solve for x
    x = 248,853.09/612.75
  6. Step 6: Final answer
    x = 406.13

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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.