Home / 408,230,401.20-612,345,601.80-391,224,289.20

Finding the Fourth Proportional to 408,230,401.20, 612,345,601.80 and 391,224,289.20

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Solution

The fourth proportional to 408,230,401.20, 612,345,601.80 and 391,224,289.20 is: 586,836,433.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,230,401.20 : 612,345,601.80 = 391,224,289.20 : x
  2. Step 2: Convert to fraction form
    408,230,401.20/612,345,601.80 = 391,224,289.20/x
  3. Step 3: Cross multiply
    408,230,401.20x = 612,345,601.80 × 391,224,289.20
  4. Step 4: Simplify right side
    408,230,401.20x = 239,564,472,808,951,200
  5. Step 5: Solve for x
    x = 239,564,472,808,951,200/408,230,401.20
  6. Step 6: Final answer
    x = 586,836,433.80

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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.