Home / 1,929.28-2,661.43-1,219.93

Finding the Fourth Proportional to 1,929.28, 2,661.43 and 1,219.93

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Solution

The fourth proportional to 1,929.28, 2,661.43 and 1,219.93 is: 1,682.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.28 : 2,661.43 = 1,219.93 : x
  2. Step 2: Convert to fraction form
    1,929.28/2,661.43 = 1,219.93/x
  3. Step 3: Cross multiply
    1,929.28x = 2,661.43 × 1,219.93
  4. Step 4: Simplify right side
    1,929.28x = 3,246,770.28
  5. Step 5: Solve for x
    x = 3,246,770.28/1,929.28
  6. Step 6: Final answer
    x = 1,682.89

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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.