Home / 426,450.70-639,665.00-173,730.78

Finding the Fourth Proportional to 426,450.70, 639,665.00 and 173,730.78

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Solution

The fourth proportional to 426,450.70, 639,665.00 and 173,730.78 is: 260,591.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,450.70 : 639,665.00 = 173,730.78 : x
  2. Step 2: Convert to fraction form
    426,450.70/639,665.00 = 173,730.78/x
  3. Step 3: Cross multiply
    426,450.70x = 639,665.00 × 173,730.78
  4. Step 4: Simplify right side
    426,450.70x = 111,129,499,823.03
  5. Step 5: Solve for x
    x = 111,129,499,823.03/426,450.70
  6. Step 6: Final answer
    x = 260,591.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.