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Finding the Fourth Proportional to 507.72, 762.12 and 291.72

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Solution

The fourth proportional to 507.72, 762.12 and 291.72 is: 437.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.72 : 762.12 = 291.72 : x
  2. Step 2: Convert to fraction form
    507.72/762.12 = 291.72/x
  3. Step 3: Cross multiply
    507.72x = 762.12 × 291.72
  4. Step 4: Simplify right side
    507.72x = 222,325.65
  5. Step 5: Solve for x
    x = 222,325.65/507.72
  6. Step 6: Final answer
    x = 437.89

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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.