Home / 408,229,675.20-612,344,512.80-391,223,563.20

Finding the Fourth Proportional to 408,229,675.20, 612,344,512.80 and 391,223,563.20

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Solution

The fourth proportional to 408,229,675.20, 612,344,512.80 and 391,223,563.20 is: 586,835,344.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,229,675.20 : 612,344,512.80 = 391,223,563.20 : x
  2. Step 2: Convert to fraction form
    408,229,675.20/612,344,512.80 = 391,223,563.20/x
  3. Step 3: Cross multiply
    408,229,675.20x = 612,344,512.80 × 391,223,563.20
  4. Step 4: Simplify right side
    408,229,675.20x = 239,563,602,203,583,968
  5. Step 5: Solve for x
    x = 239,563,602,203,583,968/408,229,675.20
  6. Step 6: Final answer
    x = 586,835,344.80

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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.