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Finding the Fourth Proportional to 507.31, 762.72 and 443.59

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Solution

The fourth proportional to 507.31, 762.72 and 443.59 is: 666.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.31 : 762.72 = 443.59 : x
  2. Step 2: Convert to fraction form
    507.31/762.72 = 443.59/x
  3. Step 3: Cross multiply
    507.31x = 762.72 × 443.59
  4. Step 4: Simplify right side
    507.31x = 338,334.96
  5. Step 5: Solve for x
    x = 338,334.96/507.31
  6. Step 6: Final answer
    x = 666.92

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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.