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Finding the Fourth Proportional to 986,215.20, 1,479,208 and 266,522.80

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Solution

The fourth proportional to 986,215.20, 1,479,208 and 266,522.80 is: 399,753.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,215.20 : 1,479,208 = 266,522.80 : x
  2. Step 2: Convert to fraction form
    986,215.20/1,479,208 = 266,522.80/x
  3. Step 3: Cross multiply
    986,215.20x = 1,479,208 × 266,522.80
  4. Step 4: Simplify right side
    986,215.20x = 394,242,657,942.40
  5. Step 5: Solve for x
    x = 394,242,657,942.40/986,215.20
  6. Step 6: Final answer
    x = 399,753.18

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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.