Home / 386,789.83-580,566.57-290,391.76

Finding the Fourth Proportional to 386,789.83, 580,566.57 and 290,391.76

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Solution

The fourth proportional to 386,789.83, 580,566.57 and 290,391.76 is: 435,874.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,789.83 : 580,566.57 = 290,391.76 : x
  2. Step 2: Convert to fraction form
    386,789.83/580,566.57 = 290,391.76/x
  3. Step 3: Cross multiply
    386,789.83x = 580,566.57 × 290,391.76
  4. Step 4: Simplify right side
    386,789.83x = 168,591,746,608.05
  5. Step 5: Solve for x
    x = 168,591,746,608.05/386,789.83
  6. Step 6: Final answer
    x = 435,874.30

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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.