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Finding the Fourth Proportional to 408,318.40, 612,040.20 and 183,640.60

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Solution

The fourth proportional to 408,318.40, 612,040.20 and 183,640.60 is: 275,264.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,318.40 : 612,040.20 = 183,640.60 : x
  2. Step 2: Convert to fraction form
    408,318.40/612,040.20 = 183,640.60/x
  3. Step 3: Cross multiply
    408,318.40x = 612,040.20 × 183,640.60
  4. Step 4: Simplify right side
    408,318.40x = 112,395,429,552.12
  5. Step 5: Solve for x
    x = 112,395,429,552.12/408,318.40
  6. Step 6: Final answer
    x = 275,264.18

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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.