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Finding the Fourth Proportional to 539.21, 809.01 and 214.67

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Solution

The fourth proportional to 539.21, 809.01 and 214.67 is: 322.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.21 : 809.01 = 214.67 : x
  2. Step 2: Convert to fraction form
    539.21/809.01 = 214.67/x
  3. Step 3: Cross multiply
    539.21x = 809.01 × 214.67
  4. Step 4: Simplify right side
    539.21x = 173,666.13
  5. Step 5: Solve for x
    x = 173,666.13/539.21
  6. Step 6: Final answer
    x = 322.08

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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.