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Finding the Fourth Proportional to 515,782.77, 772,758.86 and 215,601.63

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Solution

The fourth proportional to 515,782.77, 772,758.86 and 215,601.63 is: 323,019.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,782.77 : 772,758.86 = 215,601.63 : x
  2. Step 2: Convert to fraction form
    515,782.77/772,758.86 = 215,601.63/x
  3. Step 3: Cross multiply
    515,782.77x = 772,758.86 × 215,601.63
  4. Step 4: Simplify right side
    515,782.77x = 166,608,068,734.93
  5. Step 5: Solve for x
    x = 166,608,068,734.93/515,782.77
  6. Step 6: Final answer
    x = 323,019.84

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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.