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Finding the Fourth Proportional to 533.91, 799.16 and 387.15

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Solution

The fourth proportional to 533.91, 799.16 and 387.15 is: 579.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.91 : 799.16 = 387.15 : x
  2. Step 2: Convert to fraction form
    533.91/799.16 = 387.15/x
  3. Step 3: Cross multiply
    533.91x = 799.16 × 387.15
  4. Step 4: Simplify right side
    533.91x = 309,392.86
  5. Step 5: Solve for x
    x = 309,392.86/533.91
  6. Step 6: Final answer
    x = 579.49

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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.