Home / 1,990.18-2,746.24-1,150.75

Finding the Fourth Proportional to 1,990.18, 2,746.24 and 1,150.75

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Solution

The fourth proportional to 1,990.18, 2,746.24 and 1,150.75 is: 1,587.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.18 : 2,746.24 = 1,150.75 : x
  2. Step 2: Convert to fraction form
    1,990.18/2,746.24 = 1,150.75/x
  3. Step 3: Cross multiply
    1,990.18x = 2,746.24 × 1,150.75
  4. Step 4: Simplify right side
    1,990.18x = 3,160,235.68
  5. Step 5: Solve for x
    x = 3,160,235.68/1,990.18
  6. Step 6: Final answer
    x = 1,587.91

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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.