Home / 1,980.61-2,732.04-1,272.21

Finding the Fourth Proportional to 1,980.61, 2,732.04 and 1,272.21

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Solution

The fourth proportional to 1,980.61, 2,732.04 and 1,272.21 is: 1,754.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.61 : 2,732.04 = 1,272.21 : x
  2. Step 2: Convert to fraction form
    1,980.61/2,732.04 = 1,272.21/x
  3. Step 3: Cross multiply
    1,980.61x = 2,732.04 × 1,272.21
  4. Step 4: Simplify right side
    1,980.61x = 3,475,728.61
  5. Step 5: Solve for x
    x = 3,475,728.61/1,980.61
  6. Step 6: Final answer
    x = 1,754.88

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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.