Home / 2,778.20-4,167.34-929.32

Finding the Fourth Proportional to 2,778.20, 4,167.34 and 929.32

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Solution

The fourth proportional to 2,778.20, 4,167.34 and 929.32 is: 1,393.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.20 : 4,167.34 = 929.32 : x
  2. Step 2: Convert to fraction form
    2,778.20/4,167.34 = 929.32/x
  3. Step 3: Cross multiply
    2,778.20x = 4,167.34 × 929.32
  4. Step 4: Simplify right side
    2,778.20x = 3,872,771.57
  5. Step 5: Solve for x
    x = 3,872,771.57/2,778.20
  6. Step 6: Final answer
    x = 1,393.99

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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.