Home / 2,778.60-4,168.20-929.64

Finding the Fourth Proportional to 2,778.60, 4,168.20 and 929.64

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Solution

The fourth proportional to 2,778.60, 4,168.20 and 929.64 is: 1,394.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.60 : 4,168.20 = 929.64 : x
  2. Step 2: Convert to fraction form
    2,778.60/4,168.20 = 929.64/x
  3. Step 3: Cross multiply
    2,778.60x = 4,168.20 × 929.64
  4. Step 4: Simplify right side
    2,778.60x = 3,874,925.45
  5. Step 5: Solve for x
    x = 3,874,925.45/2,778.60
  6. Step 6: Final answer
    x = 1,394.56

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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.