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Finding the Fourth Proportional to 551,644.45, 761,227.84 and 309,879.80

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Solution

The fourth proportional to 551,644.45, 761,227.84 and 309,879.80 is: 427,610.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,644.45 : 761,227.84 = 309,879.80 : x
  2. Step 2: Convert to fraction form
    551,644.45/761,227.84 = 309,879.80/x
  3. Step 3: Cross multiply
    551,644.45x = 761,227.84 × 309,879.80
  4. Step 4: Simplify right side
    551,644.45x = 235,889,129,264.23
  5. Step 5: Solve for x
    x = 235,889,129,264.23/551,644.45
  6. Step 6: Final answer
    x = 427,610.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.