Home / 2,777.47-3,827.63-1,990.15

Finding the Fourth Proportional to 2,777.47, 3,827.63 and 1,990.15

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Solution

The fourth proportional to 2,777.47, 3,827.63 and 1,990.15 is: 2,742.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.47 : 3,827.63 = 1,990.15 : x
  2. Step 2: Convert to fraction form
    2,777.47/3,827.63 = 1,990.15/x
  3. Step 3: Cross multiply
    2,777.47x = 3,827.63 × 1,990.15
  4. Step 4: Simplify right side
    2,777.47x = 7,617,553.25
  5. Step 5: Solve for x
    x = 7,617,553.25/2,777.47
  6. Step 6: Final answer
    x = 2,742.63

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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.