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Finding the Fourth Proportional to 339.49, 509.79 and 322.17

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Solution

The fourth proportional to 339.49, 509.79 and 322.17 is: 483.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.49 : 509.79 = 322.17 : x
  2. Step 2: Convert to fraction form
    339.49/509.79 = 322.17/x
  3. Step 3: Cross multiply
    339.49x = 509.79 × 322.17
  4. Step 4: Simplify right side
    339.49x = 164,238.07
  5. Step 5: Solve for x
    x = 164,238.07/339.49
  6. Step 6: Final answer
    x = 483.79

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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.