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Finding the Fourth Proportional to 663,822,007.20, 995,733,010.80 and 280,819,792.80

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Solution

The fourth proportional to 663,822,007.20, 995,733,010.80 and 280,819,792.80 is: 421,229,689.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,822,007.20 : 995,733,010.80 = 280,819,792.80 : x
  2. Step 2: Convert to fraction form
    663,822,007.20/995,733,010.80 = 280,819,792.80/x
  3. Step 3: Cross multiply
    663,822,007.20x = 995,733,010.80 × 280,819,792.80
  4. Step 4: Simplify right side
    663,822,007.20x = 279,621,537,776,976,160
  5. Step 5: Solve for x
    x = 279,621,537,776,976,160/663,822,007.20
  6. Step 6: Final answer
    x = 421,229,689.20

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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.