Home / 420,807.25-580,717.70-239,530.85

Finding the Fourth Proportional to 420,807.25, 580,717.70 and 239,530.85

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Solution

The fourth proportional to 420,807.25, 580,717.70 and 239,530.85 is: 330,554.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,807.25 : 580,717.70 = 239,530.85 : x
  2. Step 2: Convert to fraction form
    420,807.25/580,717.70 = 239,530.85/x
  3. Step 3: Cross multiply
    420,807.25x = 580,717.70 × 239,530.85
  4. Step 4: Simplify right side
    420,807.25x = 139,099,802,979.83
  5. Step 5: Solve for x
    x = 139,099,802,979.83/420,807.25
  6. Step 6: Final answer
    x = 330,554.67

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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.