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Finding the Fourth Proportional to 266,940.40, 399,827.40 and 207,308.20

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Solution

The fourth proportional to 266,940.40, 399,827.40 and 207,308.20 is: 310,509.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,940.40 : 399,827.40 = 207,308.20 : x
  2. Step 2: Convert to fraction form
    266,940.40/399,827.40 = 207,308.20/x
  3. Step 3: Cross multiply
    266,940.40x = 399,827.40 × 207,308.20
  4. Step 4: Simplify right side
    266,940.40x = 82,887,498,604.68
  5. Step 5: Solve for x
    x = 82,887,498,604.68/266,940.40
  6. Step 6: Final answer
    x = 310,509.38

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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.