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Finding the Fourth Proportional to 613.36, 919.79 and 305.10

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Solution

The fourth proportional to 613.36, 919.79 and 305.10 is: 457.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.36 : 919.79 = 305.10 : x
  2. Step 2: Convert to fraction form
    613.36/919.79 = 305.10/x
  3. Step 3: Cross multiply
    613.36x = 919.79 × 305.10
  4. Step 4: Simplify right side
    613.36x = 280,627.93
  5. Step 5: Solve for x
    x = 280,627.93/613.36
  6. Step 6: Final answer
    x = 457.53

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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.