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Finding the Fourth Proportional to 1,990.01, 2,746.30 and 1,105.90

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Solution

The fourth proportional to 1,990.01, 2,746.30 and 1,105.90 is: 1,526.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.01 : 2,746.30 = 1,105.90 : x
  2. Step 2: Convert to fraction form
    1,990.01/2,746.30 = 1,105.90/x
  3. Step 3: Cross multiply
    1,990.01x = 2,746.30 × 1,105.90
  4. Step 4: Simplify right side
    1,990.01x = 3,037,133.17
  5. Step 5: Solve for x
    x = 3,037,133.17/1,990.01
  6. Step 6: Final answer
    x = 1,526.19

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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.