Home / 1,429.27-2,140.66-1,285.09

Finding the Fourth Proportional to 1,429.27, 2,140.66 and 1,285.09

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Solution

The fourth proportional to 1,429.27, 2,140.66 and 1,285.09 is: 1,924.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.27 : 2,140.66 = 1,285.09 : x
  2. Step 2: Convert to fraction form
    1,429.27/2,140.66 = 1,285.09/x
  3. Step 3: Cross multiply
    1,429.27x = 2,140.66 × 1,285.09
  4. Step 4: Simplify right side
    1,429.27x = 2,750,940.76
  5. Step 5: Solve for x
    x = 2,750,940.76/1,429.27
  6. Step 6: Final answer
    x = 1,924.72

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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.