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Finding the Fourth Proportional to 507.68, 699.46 and 381.11

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Solution

The fourth proportional to 507.68, 699.46 and 381.11 is: 525.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.68 : 699.46 = 381.11 : x
  2. Step 2: Convert to fraction form
    507.68/699.46 = 381.11/x
  3. Step 3: Cross multiply
    507.68x = 699.46 × 381.11
  4. Step 4: Simplify right side
    507.68x = 266,571.20
  5. Step 5: Solve for x
    x = 266,571.20/507.68
  6. Step 6: Final answer
    x = 525.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.