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Finding the Fourth Proportional to 399,467.80, 599,892.90 and 212,843.80

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Solution

The fourth proportional to 399,467.80, 599,892.90 and 212,843.80 is: 319,633.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,467.80 : 599,892.90 = 212,843.80 : x
  2. Step 2: Convert to fraction form
    399,467.80/599,892.90 = 212,843.80/x
  3. Step 3: Cross multiply
    399,467.80x = 599,892.90 × 212,843.80
  4. Step 4: Simplify right side
    399,467.80x = 127,683,484,429.02
  5. Step 5: Solve for x
    x = 127,683,484,429.02/399,467.80
  6. Step 6: Final answer
    x = 319,633.98

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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.