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Finding the Fourth Proportional to 266,891.40, 399,753.90 and 207,259.20

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Solution

The fourth proportional to 266,891.40, 399,753.90 and 207,259.20 is: 310,435.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,891.40 : 399,753.90 = 207,259.20 : x
  2. Step 2: Convert to fraction form
    266,891.40/399,753.90 = 207,259.20/x
  3. Step 3: Cross multiply
    266,891.40x = 399,753.90 × 207,259.20
  4. Step 4: Simplify right side
    266,891.40x = 82,852,673,510.88
  5. Step 5: Solve for x
    x = 82,852,673,510.88/266,891.40
  6. Step 6: Final answer
    x = 310,435.91

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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.