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Finding the Fourth Proportional to 508.40, 762.57 and 200.30

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Solution

The fourth proportional to 508.40, 762.57 and 200.30 is: 300.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.40 : 762.57 = 200.30 : x
  2. Step 2: Convert to fraction form
    508.40/762.57 = 200.30/x
  3. Step 3: Cross multiply
    508.40x = 762.57 × 200.30
  4. Step 4: Simplify right side
    508.40x = 152,744.68
  5. Step 5: Solve for x
    x = 152,744.68/508.40
  6. Step 6: Final answer
    x = 300.44

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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.