Home / 420,745.32-580,678.20-236,989.89

Finding the Fourth Proportional to 420,745.32, 580,678.20 and 236,989.89

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Solution

The fourth proportional to 420,745.32, 580,678.20 and 236,989.89 is: 327,074.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,745.32 : 580,678.20 = 236,989.89 : x
  2. Step 2: Convert to fraction form
    420,745.32/580,678.20 = 236,989.89/x
  3. Step 3: Cross multiply
    420,745.32x = 580,678.20 × 236,989.89
  4. Step 4: Simplify right side
    420,745.32x = 137,614,862,743.40
  5. Step 5: Solve for x
    x = 137,614,862,743.40/420,745.32
  6. Step 6: Final answer
    x = 327,074.02

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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.