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Finding the Fourth Proportional to 5,920.30, 8,879.76 and 4,939.36

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Solution

The fourth proportional to 5,920.30, 8,879.76 and 4,939.36 is: 7,408.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,920.30 : 8,879.76 = 4,939.36 : x
  2. Step 2: Convert to fraction form
    5,920.30/8,879.76 = 4,939.36/x
  3. Step 3: Cross multiply
    5,920.30x = 8,879.76 × 4,939.36
  4. Step 4: Simplify right side
    5,920.30x = 43,860,331.35
  5. Step 5: Solve for x
    x = 43,860,331.35/5,920.30
  6. Step 6: Final answer
    x = 7,408.46

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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.