Home / 399,091.20-598,636.80-189,139.20

Finding the Fourth Proportional to 399,091.20, 598,636.80 and 189,139.20

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Solution

The fourth proportional to 399,091.20, 598,636.80 and 189,139.20 is: 283,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,091.20 : 598,636.80 = 189,139.20 : x
  2. Step 2: Convert to fraction form
    399,091.20/598,636.80 = 189,139.20/x
  3. Step 3: Cross multiply
    399,091.20x = 598,636.80 × 189,139.20
  4. Step 4: Simplify right side
    399,091.20x = 113,225,685,442.56
  5. Step 5: Solve for x
    x = 113,225,685,442.56/399,091.20
  6. Step 6: Final answer
    x = 283,708.80

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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.