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Finding the Fourth Proportional to 508.84, 762.72 and 323.88

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Solution

The fourth proportional to 508.84, 762.72 and 323.88 is: 485.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.84 : 762.72 = 323.88 : x
  2. Step 2: Convert to fraction form
    508.84/762.72 = 323.88/x
  3. Step 3: Cross multiply
    508.84x = 762.72 × 323.88
  4. Step 4: Simplify right side
    508.84x = 247,031.79
  5. Step 5: Solve for x
    x = 247,031.79/508.84
  6. Step 6: Final answer
    x = 485.48

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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.