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Finding the Fourth Proportional to 508.49, 763.38 and 326.69

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Solution

The fourth proportional to 508.49, 763.38 and 326.69 is: 490.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.49 : 763.38 = 326.69 : x
  2. Step 2: Convert to fraction form
    508.49/763.38 = 326.69/x
  3. Step 3: Cross multiply
    508.49x = 763.38 × 326.69
  4. Step 4: Simplify right side
    508.49x = 249,388.61
  5. Step 5: Solve for x
    x = 249,388.61/508.49
  6. Step 6: Final answer
    x = 490.45

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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.