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Finding the Fourth Proportional to 539.40, 809.10 and 230.82

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Solution

The fourth proportional to 539.40, 809.10 and 230.82 is: 346.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.40 : 809.10 = 230.82 : x
  2. Step 2: Convert to fraction form
    539.40/809.10 = 230.82/x
  3. Step 3: Cross multiply
    539.40x = 809.10 × 230.82
  4. Step 4: Simplify right side
    539.40x = 186,756.46
  5. Step 5: Solve for x
    x = 186,756.46/539.40
  6. Step 6: Final answer
    x = 346.23

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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.