Home / 2,178.77-3,006.78-1,234.60

Finding the Fourth Proportional to 2,178.77, 3,006.78 and 1,234.60

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Solution

The fourth proportional to 2,178.77, 3,006.78 and 1,234.60 is: 1,703.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.77 : 3,006.78 = 1,234.60 : x
  2. Step 2: Convert to fraction form
    2,178.77/3,006.78 = 1,234.60/x
  3. Step 3: Cross multiply
    2,178.77x = 3,006.78 × 1,234.60
  4. Step 4: Simplify right side
    2,178.77x = 3,712,170.59
  5. Step 5: Solve for x
    x = 3,712,170.59/2,178.77
  6. Step 6: Final answer
    x = 1,703.79

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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.