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Finding the Fourth Proportional to 507.19, 760.78 and 165.19

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Solution

The fourth proportional to 507.19, 760.78 and 165.19 is: 247.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.19 : 760.78 = 165.19 : x
  2. Step 2: Convert to fraction form
    507.19/760.78 = 165.19/x
  3. Step 3: Cross multiply
    507.19x = 760.78 × 165.19
  4. Step 4: Simplify right side
    507.19x = 125,673.25
  5. Step 5: Solve for x
    x = 125,673.25/507.19
  6. Step 6: Final answer
    x = 247.78

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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.