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Finding the Fourth Proportional to 533.40, 800.39 and 259.49

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Solution

The fourth proportional to 533.40, 800.39 and 259.49 is: 389.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.40 : 800.39 = 259.49 : x
  2. Step 2: Convert to fraction form
    533.40/800.39 = 259.49/x
  3. Step 3: Cross multiply
    533.40x = 800.39 × 259.49
  4. Step 4: Simplify right side
    533.40x = 207,695.54
  5. Step 5: Solve for x
    x = 207,695.54/533.40
  6. Step 6: Final answer
    x = 389.38

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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.