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Finding the Fourth Proportional to 266,064.80, 399,097.20 and 261,690.80

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Solution

The fourth proportional to 266,064.80, 399,097.20 and 261,690.80 is: 392,536.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,064.80 : 399,097.20 = 261,690.80 : x
  2. Step 2: Convert to fraction form
    266,064.80/399,097.20 = 261,690.80/x
  3. Step 3: Cross multiply
    266,064.80x = 399,097.20 × 261,690.80
  4. Step 4: Simplify right side
    266,064.80x = 104,440,065,545.76
  5. Step 5: Solve for x
    x = 104,440,065,545.76/266,064.80
  6. Step 6: Final answer
    x = 392,536.20

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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.