Home / 386,453.20-579,967.80-199,368.40

Finding the Fourth Proportional to 386,453.20, 579,967.80 and 199,368.40

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Solution

The fourth proportional to 386,453.20, 579,967.80 and 199,368.40 is: 299,201.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,453.20 : 579,967.80 = 199,368.40 : x
  2. Step 2: Convert to fraction form
    386,453.20/579,967.80 = 199,368.40/x
  3. Step 3: Cross multiply
    386,453.20x = 579,967.80 × 199,368.40
  4. Step 4: Simplify right side
    386,453.20x = 115,627,252,337.52
  5. Step 5: Solve for x
    x = 115,627,252,337.52/386,453.20
  6. Step 6: Final answer
    x = 299,201.18

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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.