Home / 2,379.78-3,284.30-1,385.15

Finding the Fourth Proportional to 2,379.78, 3,284.30 and 1,385.15

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Solution

The fourth proportional to 2,379.78, 3,284.30 and 1,385.15 is: 1,911.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.78 : 3,284.30 = 1,385.15 : x
  2. Step 2: Convert to fraction form
    2,379.78/3,284.30 = 1,385.15/x
  3. Step 3: Cross multiply
    2,379.78x = 3,284.30 × 1,385.15
  4. Step 4: Simplify right side
    2,379.78x = 4,549,245.87
  5. Step 5: Solve for x
    x = 4,549,245.87/2,379.78
  6. Step 6: Final answer
    x = 1,911.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.