Home / 628,542.43-867,408.23-356,621.78

Finding the Fourth Proportional to 628,542.43, 867,408.23 and 356,621.78

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Solution

The fourth proportional to 628,542.43, 867,408.23 and 356,621.78 is: 492,149.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,542.43 : 867,408.23 = 356,621.78 : x
  2. Step 2: Convert to fraction form
    628,542.43/867,408.23 = 356,621.78/x
  3. Step 3: Cross multiply
    628,542.43x = 867,408.23 × 356,621.78
  4. Step 4: Simplify right side
    628,542.43x = 309,336,670,029.32
  5. Step 5: Solve for x
    x = 309,336,670,029.32/628,542.43
  6. Step 6: Final answer
    x = 492,149.23

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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.