Home / 1,990.80-2,746.93-1,151.53

Finding the Fourth Proportional to 1,990.80, 2,746.93 and 1,151.53

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Solution

The fourth proportional to 1,990.80, 2,746.93 and 1,151.53 is: 1,588.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.80 : 2,746.93 = 1,151.53 : x
  2. Step 2: Convert to fraction form
    1,990.80/2,746.93 = 1,151.53/x
  3. Step 3: Cross multiply
    1,990.80x = 2,746.93 × 1,151.53
  4. Step 4: Simplify right side
    1,990.80x = 3,163,172.30
  5. Step 5: Solve for x
    x = 3,163,172.30/1,990.80
  6. Step 6: Final answer
    x = 1,588.90

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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.