Home / 2,278.20-3,417.50-979.77

Finding the Fourth Proportional to 2,278.20, 3,417.50 and 979.77

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Solution

The fourth proportional to 2,278.20, 3,417.50 and 979.77 is: 1,469.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.20 : 3,417.50 = 979.77 : x
  2. Step 2: Convert to fraction form
    2,278.20/3,417.50 = 979.77/x
  3. Step 3: Cross multiply
    2,278.20x = 3,417.50 × 979.77
  4. Step 4: Simplify right side
    2,278.20x = 3,348,363.98
  5. Step 5: Solve for x
    x = 3,348,363.98/2,278.20
  6. Step 6: Final answer
    x = 1,469.74

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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.