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Finding the Fourth Proportional to 485,377,662.80, 728,066,494.20 and 178,889,733.20

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Solution

The fourth proportional to 485,377,662.80, 728,066,494.20 and 178,889,733.20 is: 268,334,599.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,377,662.80 : 728,066,494.20 = 178,889,733.20 : x
  2. Step 2: Convert to fraction form
    485,377,662.80/728,066,494.20 = 178,889,733.20/x
  3. Step 3: Cross multiply
    485,377,662.80x = 728,066,494.20 × 178,889,733.20
  4. Step 4: Simplify right side
    485,377,662.80x = 130,243,620,899,297,344
  5. Step 5: Solve for x
    x = 130,243,620,899,297,344/485,377,662.80
  6. Step 6: Final answer
    x = 268,334,599.80

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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.