Home / 2,178.19-3,005.00-1,431.17

Finding the Fourth Proportional to 2,178.19, 3,005.00 and 1,431.17

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Solution

The fourth proportional to 2,178.19, 3,005.00 and 1,431.17 is: 1,974.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.19 : 3,005.00 = 1,431.17 : x
  2. Step 2: Convert to fraction form
    2,178.19/3,005.00 = 1,431.17/x
  3. Step 3: Cross multiply
    2,178.19x = 3,005.00 × 1,431.17
  4. Step 4: Simplify right side
    2,178.19x = 4,300,660.30
  5. Step 5: Solve for x
    x = 4,300,660.30/2,178.19
  6. Step 6: Final answer
    x = 1,974.42

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Half scale
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Double 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.