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Finding the Fourth Proportional to 1,990.22, 2,746.50 and 1,106.11

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Solution

The fourth proportional to 1,990.22, 2,746.50 and 1,106.11 is: 1,526.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.22 : 2,746.50 = 1,106.11 : x
  2. Step 2: Convert to fraction form
    1,990.22/2,746.50 = 1,106.11/x
  3. Step 3: Cross multiply
    1,990.22x = 2,746.50 × 1,106.11
  4. Step 4: Simplify right side
    1,990.22x = 3,037,931.12
  5. Step 5: Solve for x
    x = 3,037,931.12/1,990.22
  6. Step 6: Final answer
    x = 1,526.43

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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.