Home / 1,990-2,746.20-1,105.95

Finding the Fourth Proportional to 1,990, 2,746.20 and 1,105.95

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Solution

The fourth proportional to 1,990, 2,746.20 and 1,105.95 is: 1,526.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990 : 2,746.20 = 1,105.95 : x
  2. Step 2: Convert to fraction form
    1,990/2,746.20 = 1,105.95/x
  3. Step 3: Cross multiply
    1,990x = 2,746.20 × 1,105.95
  4. Step 4: Simplify right side
    1,990x = 3,037,159.89
  5. Step 5: Solve for x
    x = 3,037,159.89/1,990
  6. Step 6: Final answer
    x = 1,526.21

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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.