Home / 2,166.36-2,990.70-1,328.28

Finding the Fourth Proportional to 2,166.36, 2,990.70 and 1,328.28

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Solution

The fourth proportional to 2,166.36, 2,990.70 and 1,328.28 is: 1,833.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.36 : 2,990.70 = 1,328.28 : x
  2. Step 2: Convert to fraction form
    2,166.36/2,990.70 = 1,328.28/x
  3. Step 3: Cross multiply
    2,166.36x = 2,990.70 × 1,328.28
  4. Step 4: Simplify right side
    2,166.36x = 3,972,487.00
  5. Step 5: Solve for x
    x = 3,972,487.00/2,166.36
  6. Step 6: Final answer
    x = 1,833.72

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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.