Home / 386,243.20-579,422.40-136,905.60

Finding the Fourth Proportional to 386,243.20, 579,422.40 and 136,905.60

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Solution

The fourth proportional to 386,243.20, 579,422.40 and 136,905.60 is: 205,378.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,243.20 : 579,422.40 = 136,905.60 : x
  2. Step 2: Convert to fraction form
    386,243.20/579,422.40 = 136,905.60/x
  3. Step 3: Cross multiply
    386,243.20x = 579,422.40 × 136,905.60
  4. Step 4: Simplify right side
    386,243.20x = 79,326,171,325.44
  5. Step 5: Solve for x
    x = 79,326,171,325.44/386,243.20
  6. Step 6: Final answer
    x = 205,378.82

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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.