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Finding the Fourth Proportional to 507.15, 699.86 and 274.27

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Solution

The fourth proportional to 507.15, 699.86 and 274.27 is: 378.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.15 : 699.86 = 274.27 : x
  2. Step 2: Convert to fraction form
    507.15/699.86 = 274.27/x
  3. Step 3: Cross multiply
    507.15x = 699.86 × 274.27
  4. Step 4: Simplify right side
    507.15x = 191,952.16
  5. Step 5: Solve for x
    x = 191,952.16/507.15
  6. Step 6: Final answer
    x = 378.49

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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.