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Finding the Fourth Proportional to 551,337,012.70, 827,005,519.05 and 426,501,521.80

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Solution

The fourth proportional to 551,337,012.70, 827,005,519.05 and 426,501,521.80 is: 639,752,282.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,337,012.70 : 827,005,519.05 = 426,501,521.80 : x
  2. Step 2: Convert to fraction form
    551,337,012.70/827,005,519.05 = 426,501,521.80/x
  3. Step 3: Cross multiply
    551,337,012.70x = 827,005,519.05 × 426,501,521.80
  4. Step 4: Simplify right side
    551,337,012.70x = 352,719,112,411,823,872
  5. Step 5: Solve for x
    x = 352,719,112,411,823,872/551,337,012.70
  6. Step 6: Final answer
    x = 639,752,282.70

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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.