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Finding the Fourth Proportional to 402,806.40, 604,190.40 and 136,540.80

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Solution

The fourth proportional to 402,806.40, 604,190.40 and 136,540.80 is: 204,804.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,806.40 : 604,190.40 = 136,540.80 : x
  2. Step 2: Convert to fraction form
    402,806.40/604,190.40 = 136,540.80/x
  3. Step 3: Cross multiply
    402,806.40x = 604,190.40 × 136,540.80
  4. Step 4: Simplify right side
    402,806.40x = 82,496,640,568.32
  5. Step 5: Solve for x
    x = 82,496,640,568.32/402,806.40
  6. Step 6: Final answer
    x = 204,804.69

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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.