Home / 420,729.80-580,610.28-239,455.52

Finding the Fourth Proportional to 420,729.80, 580,610.28 and 239,455.52

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Solution

The fourth proportional to 420,729.80, 580,610.28 and 239,455.52 is: 330,450.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,729.80 : 580,610.28 = 239,455.52 : x
  2. Step 2: Convert to fraction form
    420,729.80/580,610.28 = 239,455.52/x
  3. Step 3: Cross multiply
    420,729.80x = 580,610.28 × 239,455.52
  4. Step 4: Simplify right side
    420,729.80x = 139,030,336,514.75
  5. Step 5: Solve for x
    x = 139,030,336,514.75/420,729.80
  6. Step 6: Final answer
    x = 330,450.41

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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.