Home / 3,005.28-4,146.06-2,120.76

Finding the Fourth Proportional to 3,005.28, 4,146.06 and 2,120.76

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Solution

The fourth proportional to 3,005.28, 4,146.06 and 2,120.76 is: 2,925.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,005.28 : 4,146.06 = 2,120.76 : x
  2. Step 2: Convert to fraction form
    3,005.28/4,146.06 = 2,120.76/x
  3. Step 3: Cross multiply
    3,005.28x = 4,146.06 × 2,120.76
  4. Step 4: Simplify right side
    3,005.28x = 8,792,798.21
  5. Step 5: Solve for x
    x = 8,792,798.21/3,005.28
  6. Step 6: Final answer
    x = 2,925.78

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Half scale
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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.