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Finding the Fourth Proportional to 679.54, 1,019.18 and 483.92

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Solution

The fourth proportional to 679.54, 1,019.18 and 483.92 is: 725.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.54 : 1,019.18 = 483.92 : x
  2. Step 2: Convert to fraction form
    679.54/1,019.18 = 483.92/x
  3. Step 3: Cross multiply
    679.54x = 1,019.18 × 483.92
  4. Step 4: Simplify right side
    679.54x = 493,201.59
  5. Step 5: Solve for x
    x = 493,201.59/679.54
  6. Step 6: Final answer
    x = 725.79

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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.