Home / 420,299.83-579,990-239,055.85

Finding the Fourth Proportional to 420,299.83, 579,990 and 239,055.85

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Solution

The fourth proportional to 420,299.83, 579,990 and 239,055.85 is: 329,883.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,299.83 : 579,990 = 239,055.85 : x
  2. Step 2: Convert to fraction form
    420,299.83/579,990 = 239,055.85/x
  3. Step 3: Cross multiply
    420,299.83x = 579,990 × 239,055.85
  4. Step 4: Simplify right side
    420,299.83x = 138,650,002,441.50
  5. Step 5: Solve for x
    x = 138,650,002,441.50/420,299.83
  6. Step 6: Final answer
    x = 329,883.56

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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.