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Finding the Fourth Proportional to 507.90, 760.78 and 324.35

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Solution

The fourth proportional to 507.90, 760.78 and 324.35 is: 485.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.90 : 760.78 = 324.35 : x
  2. Step 2: Convert to fraction form
    507.90/760.78 = 324.35/x
  3. Step 3: Cross multiply
    507.90x = 760.78 × 324.35
  4. Step 4: Simplify right side
    507.90x = 246,761.44
  5. Step 5: Solve for x
    x = 246,761.44/507.90
  6. Step 6: Final answer
    x = 485.85

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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.