Home / 386,385.20-579,865.80-199,300.40

Finding the Fourth Proportional to 386,385.20, 579,865.80 and 199,300.40

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Solution

The fourth proportional to 386,385.20, 579,865.80 and 199,300.40 is: 299,099.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,385.20 : 579,865.80 = 199,300.40 : x
  2. Step 2: Convert to fraction form
    386,385.20/579,865.80 = 199,300.40/x
  3. Step 3: Cross multiply
    386,385.20x = 579,865.80 × 199,300.40
  4. Step 4: Simplify right side
    386,385.20x = 115,567,485,886.32
  5. Step 5: Solve for x
    x = 115,567,485,886.32/386,385.20
  6. Step 6: Final answer
    x = 299,099.15

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1.5x scale

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.