Home / 426,556.89-639,999.90-305,114.67

Finding the Fourth Proportional to 426,556.89, 639,999.90 and 305,114.67

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Solution

The fourth proportional to 426,556.89, 639,999.90 and 305,114.67 is: 457,789.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,556.89 : 639,999.90 = 305,114.67 : x
  2. Step 2: Convert to fraction form
    426,556.89/639,999.90 = 305,114.67/x
  3. Step 3: Cross multiply
    426,556.89x = 639,999.90 × 305,114.67
  4. Step 4: Simplify right side
    426,556.89x = 195,273,358,288.53
  5. Step 5: Solve for x
    x = 195,273,358,288.53/426,556.89
  6. Step 6: Final answer
    x = 457,789.72

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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.