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Finding the Fourth Proportional to 533.12, 799.76 and 258.98

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Solution

The fourth proportional to 533.12, 799.76 and 258.98 is: 388.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.12 : 799.76 = 258.98 : x
  2. Step 2: Convert to fraction form
    533.12/799.76 = 258.98/x
  3. Step 3: Cross multiply
    533.12x = 799.76 × 258.98
  4. Step 4: Simplify right side
    533.12x = 207,122.55
  5. Step 5: Solve for x
    x = 207,122.55/533.12
  6. Step 6: Final answer
    x = 388.51

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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.