Home / 1,966.32-2,712.01-1,220.72

Finding the Fourth Proportional to 1,966.32, 2,712.01 and 1,220.72

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Solution

The fourth proportional to 1,966.32, 2,712.01 and 1,220.72 is: 1,683.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,966.32 : 2,712.01 = 1,220.72 : x
  2. Step 2: Convert to fraction form
    1,966.32/2,712.01 = 1,220.72/x
  3. Step 3: Cross multiply
    1,966.32x = 2,712.01 × 1,220.72
  4. Step 4: Simplify right side
    1,966.32x = 3,310,604.85
  5. Step 5: Solve for x
    x = 3,310,604.85/1,966.32
  6. Step 6: Final answer
    x = 1,683.66

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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.