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Finding the Fourth Proportional to 613.32, 919.29 and 266.53

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Solution

The fourth proportional to 613.32, 919.29 and 266.53 is: 399.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.32 : 919.29 = 266.53 : x
  2. Step 2: Convert to fraction form
    613.32/919.29 = 266.53/x
  3. Step 3: Cross multiply
    613.32x = 919.29 × 266.53
  4. Step 4: Simplify right side
    613.32x = 245,018.36
  5. Step 5: Solve for x
    x = 245,018.36/613.32
  6. Step 6: Final answer
    x = 399.50

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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.