Home / 427,789,793.20-641,684,689.80-198,207,281.20

Finding the Fourth Proportional to 427,789,793.20, 641,684,689.80 and 198,207,281.20

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Solution

The fourth proportional to 427,789,793.20, 641,684,689.80 and 198,207,281.20 is: 297,310,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,789,793.20 : 641,684,689.80 = 198,207,281.20 : x
  2. Step 2: Convert to fraction form
    427,789,793.20/641,684,689.80 = 198,207,281.20/x
  3. Step 3: Cross multiply
    427,789,793.20x = 641,684,689.80 × 198,207,281.20
  4. Step 4: Simplify right side
    427,789,793.20x = 127,186,577,752,923,360
  5. Step 5: Solve for x
    x = 127,186,577,752,923,360/427,789,793.20
  6. Step 6: Final answer
    x = 297,310,921.80

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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.