Home / 386,512.20-580,056.30-199,427.40

Finding the Fourth Proportional to 386,512.20, 580,056.30 and 199,427.40

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Solution

The fourth proportional to 386,512.20, 580,056.30 and 199,427.40 is: 299,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,512.20 : 580,056.30 = 199,427.40 : x
  2. Step 2: Convert to fraction form
    386,512.20/580,056.30 = 199,427.40/x
  3. Step 3: Cross multiply
    386,512.20x = 580,056.30 × 199,427.40
  4. Step 4: Simplify right side
    386,512.20x = 115,679,119,762.62
  5. Step 5: Solve for x
    x = 115,679,119,762.62/386,512.20
  6. Step 6: Final answer
    x = 299,289.70

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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.