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Finding the Fourth Proportional to 509.13, 762.50 and 248.31

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Solution

The fourth proportional to 509.13, 762.50 and 248.31 is: 371.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.13 : 762.50 = 248.31 : x
  2. Step 2: Convert to fraction form
    509.13/762.50 = 248.31/x
  3. Step 3: Cross multiply
    509.13x = 762.50 × 248.31
  4. Step 4: Simplify right side
    509.13x = 189,338.80
  5. Step 5: Solve for x
    x = 189,338.80/509.13
  6. Step 6: Final answer
    x = 371.89

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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.