Home / 2,621.02-3,612.81-1,989.49

Finding the Fourth Proportional to 2,621.02, 3,612.81 and 1,989.49

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Solution

The fourth proportional to 2,621.02, 3,612.81 and 1,989.49 is: 2,742.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.02 : 3,612.81 = 1,989.49 : x
  2. Step 2: Convert to fraction form
    2,621.02/3,612.81 = 1,989.49/x
  3. Step 3: Cross multiply
    2,621.02x = 3,612.81 × 1,989.49
  4. Step 4: Simplify right side
    2,621.02x = 7,187,649.37
  5. Step 5: Solve for x
    x = 7,187,649.37/2,621.02
  6. Step 6: Final answer
    x = 2,742.31

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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.