Home / 717,942.78-990,761.27-391,255.92

Finding the Fourth Proportional to 717,942.78, 990,761.27 and 391,255.92

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Solution

The fourth proportional to 717,942.78, 990,761.27 and 391,255.92 is: 539,933.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,942.78 : 990,761.27 = 391,255.92 : x
  2. Step 2: Convert to fraction form
    717,942.78/990,761.27 = 391,255.92/x
  3. Step 3: Cross multiply
    717,942.78x = 990,761.27 × 391,255.92
  4. Step 4: Simplify right side
    717,942.78x = 387,641,212,194.22
  5. Step 5: Solve for x
    x = 387,641,212,194.22/717,942.78
  6. Step 6: Final answer
    x = 539,933.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.