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Finding the Fourth Proportional to 539.96, 809.30 and 309.01

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Solution

The fourth proportional to 539.96, 809.30 and 309.01 is: 463.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.96 : 809.30 = 309.01 : x
  2. Step 2: Convert to fraction form
    539.96/809.30 = 309.01/x
  3. Step 3: Cross multiply
    539.96x = 809.30 × 309.01
  4. Step 4: Simplify right side
    539.96x = 250,083.58
  5. Step 5: Solve for x
    x = 250,083.58/539.96
  6. Step 6: Final answer
    x = 463.15

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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.