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Finding the Fourth Proportional to 507.92, 761.28 and 219

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Solution

The fourth proportional to 507.92, 761.28 and 219 is: 328.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.92 : 761.28 = 219 : x
  2. Step 2: Convert to fraction form
    507.92/761.28 = 219/x
  3. Step 3: Cross multiply
    507.92x = 761.28 × 219
  4. Step 4: Simplify right side
    507.92x = 166,720.32
  5. Step 5: Solve for x
    x = 166,720.32/507.92
  6. Step 6: Final answer
    x = 328.24

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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.