Home / 1,990.47-2,972.19-1,574.94

Finding the Fourth Proportional to 1,990.47, 2,972.19 and 1,574.94

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Solution

The fourth proportional to 1,990.47, 2,972.19 and 1,574.94 is: 2,351.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.47 : 2,972.19 = 1,574.94 : x
  2. Step 2: Convert to fraction form
    1,990.47/2,972.19 = 1,574.94/x
  3. Step 3: Cross multiply
    1,990.47x = 2,972.19 × 1,574.94
  4. Step 4: Simplify right side
    1,990.47x = 4,681,037.97
  5. Step 5: Solve for x
    x = 4,681,037.97/1,990.47
  6. Step 6: Final answer
    x = 2,351.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.