Home / 782,387.54-1,173,581.31-427,207.80

Finding the Fourth Proportional to 782,387.54, 1,173,581.31 and 427,207.80

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Solution

The fourth proportional to 782,387.54, 1,173,581.31 and 427,207.80 is: 640,811.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,387.54 : 1,173,581.31 = 427,207.80 : x
  2. Step 2: Convert to fraction form
    782,387.54/1,173,581.31 = 427,207.80/x
  3. Step 3: Cross multiply
    782,387.54x = 1,173,581.31 × 427,207.80
  4. Step 4: Simplify right side
    782,387.54x = 501,363,093,166.13
  5. Step 5: Solve for x
    x = 501,363,093,166.13/782,387.54
  6. Step 6: Final answer
    x = 640,811.71

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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.