Home / 1,280,216.72-1,919,902.92-427,053.26

Finding the Fourth Proportional to 1,280,216.72, 1,919,902.92 and 427,053.26

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Solution

The fourth proportional to 1,280,216.72, 1,919,902.92 and 427,053.26 is: 640,439.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,216.72 : 1,919,902.92 = 427,053.26 : x
  2. Step 2: Convert to fraction form
    1,280,216.72/1,919,902.92 = 427,053.26/x
  3. Step 3: Cross multiply
    1,280,216.72x = 1,919,902.92 × 427,053.26
  4. Step 4: Simplify right side
    1,280,216.72x = 819,900,800,869.52
  5. Step 5: Solve for x
    x = 819,900,800,869.52/1,280,216.72
  6. Step 6: Final answer
    x = 640,439.07

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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.