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Finding the Fourth Proportional to 509.96, 763.87 and 326.42

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Solution

The fourth proportional to 509.96, 763.87 and 326.42 is: 488.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.96 : 763.87 = 326.42 : x
  2. Step 2: Convert to fraction form
    509.96/763.87 = 326.42/x
  3. Step 3: Cross multiply
    509.96x = 763.87 × 326.42
  4. Step 4: Simplify right side
    509.96x = 249,342.45
  5. Step 5: Solve for x
    x = 249,342.45/509.96
  6. Step 6: Final answer
    x = 488.95

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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.