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Finding the Fourth Proportional to 551,336,980.70, 827,005,471.05 and 426,501,489.80

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Solution

The fourth proportional to 551,336,980.70, 827,005,471.05 and 426,501,489.80 is: 639,752,234.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,336,980.70 : 827,005,471.05 = 426,501,489.80 : x
  2. Step 2: Convert to fraction form
    551,336,980.70/827,005,471.05 = 426,501,489.80/x
  3. Step 3: Cross multiply
    551,336,980.70x = 827,005,471.05 × 426,501,489.80
  4. Step 4: Simplify right side
    551,336,980.70x = 352,719,065,475,575,744
  5. Step 5: Solve for x
    x = 352,719,065,475,575,744/551,336,980.70
  6. Step 6: Final answer
    x = 639,752,234.70

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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.