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Finding the Fourth Proportional to 266,084.80, 399,127.20 and 261,710.80

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Solution

The fourth proportional to 266,084.80, 399,127.20 and 261,710.80 is: 392,566.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,084.80 : 399,127.20 = 261,710.80 : x
  2. Step 2: Convert to fraction form
    266,084.80/399,127.20 = 261,710.80/x
  3. Step 3: Cross multiply
    266,084.80x = 399,127.20 × 261,710.80
  4. Step 4: Simplify right side
    266,084.80x = 104,455,898,813.76
  5. Step 5: Solve for x
    x = 104,455,898,813.76/266,084.80
  6. Step 6: Final answer
    x = 392,566.20

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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.