Home / 1,776.30-2,661.21-1,288.14

Finding the Fourth Proportional to 1,776.30, 2,661.21 and 1,288.14

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Solution

The fourth proportional to 1,776.30, 2,661.21 and 1,288.14 is: 1,929.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.30 : 2,661.21 = 1,288.14 : x
  2. Step 2: Convert to fraction form
    1,776.30/2,661.21 = 1,288.14/x
  3. Step 3: Cross multiply
    1,776.30x = 2,661.21 × 1,288.14
  4. Step 4: Simplify right side
    1,776.30x = 3,428,011.05
  5. Step 5: Solve for x
    x = 3,428,011.05/1,776.30
  6. Step 6: Final answer
    x = 1,929.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.