Home / 2,778.70-4,167.18-929.39

Finding the Fourth Proportional to 2,778.70, 4,167.18 and 929.39

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Solution

The fourth proportional to 2,778.70, 4,167.18 and 929.39 is: 1,393.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.70 : 4,167.18 = 929.39 : x
  2. Step 2: Convert to fraction form
    2,778.70/4,167.18 = 929.39/x
  3. Step 3: Cross multiply
    2,778.70x = 4,167.18 × 929.39
  4. Step 4: Simplify right side
    2,778.70x = 3,872,914.58
  5. Step 5: Solve for x
    x = 3,872,914.58/2,778.70
  6. Step 6: Final answer
    x = 1,393.79

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1.5x scale

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.