Home / 2,990.81-4,127.54-1,732.20

Finding the Fourth Proportional to 2,990.81, 4,127.54 and 1,732.20

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Solution

The fourth proportional to 2,990.81, 4,127.54 and 1,732.20 is: 2,390.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.81 : 4,127.54 = 1,732.20 : x
  2. Step 2: Convert to fraction form
    2,990.81/4,127.54 = 1,732.20/x
  3. Step 3: Cross multiply
    2,990.81x = 4,127.54 × 1,732.20
  4. Step 4: Simplify right side
    2,990.81x = 7,149,716.13
  5. Step 5: Solve for x
    x = 7,149,716.13/2,990.81
  6. Step 6: Final answer
    x = 2,390.57

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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.