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Finding the Fourth Proportional to 611,299.40, 917,640.30 and 362,121.80

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Solution

The fourth proportional to 611,299.40, 917,640.30 and 362,121.80 is: 543,592.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,299.40 : 917,640.30 = 362,121.80 : x
  2. Step 2: Convert to fraction form
    611,299.40/917,640.30 = 362,121.80/x
  3. Step 3: Cross multiply
    611,299.40x = 917,640.30 × 362,121.80
  4. Step 4: Simplify right side
    611,299.40x = 332,297,557,188.54
  5. Step 5: Solve for x
    x = 332,297,557,188.54/611,299.40
  6. Step 6: Final answer
    x = 543,592.15

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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.