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Finding the Fourth Proportional to 507.28, 699.96 and 286.16

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Solution

The fourth proportional to 507.28, 699.96 and 286.16 is: 394.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.28 : 699.96 = 286.16 : x
  2. Step 2: Convert to fraction form
    507.28/699.96 = 286.16/x
  3. Step 3: Cross multiply
    507.28x = 699.96 × 286.16
  4. Step 4: Simplify right side
    507.28x = 200,300.55
  5. Step 5: Solve for x
    x = 200,300.55/507.28
  6. Step 6: Final answer
    x = 394.85

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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.