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Finding the Fourth Proportional to 507.18, 699.89 and 308.03

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Solution

The fourth proportional to 507.18, 699.89 and 308.03 is: 425.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.18 : 699.89 = 308.03 : x
  2. Step 2: Convert to fraction form
    507.18/699.89 = 308.03/x
  3. Step 3: Cross multiply
    507.18x = 699.89 × 308.03
  4. Step 4: Simplify right side
    507.18x = 215,586.01
  5. Step 5: Solve for x
    x = 215,586.01/507.18
  6. Step 6: Final answer
    x = 425.07

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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.