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Finding the Fourth Proportional to 517,719.82, 714,485.80 and 285,146.71

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Solution

The fourth proportional to 517,719.82, 714,485.80 and 285,146.71 is: 393,520.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,719.82 : 714,485.80 = 285,146.71 : x
  2. Step 2: Convert to fraction form
    517,719.82/714,485.80 = 285,146.71/x
  3. Step 3: Cross multiply
    517,719.82x = 714,485.80 × 285,146.71
  4. Step 4: Simplify right side
    517,719.82x = 203,733,275,211.72
  5. Step 5: Solve for x
    x = 203,733,275,211.72/517,719.82
  6. Step 6: Final answer
    x = 393,520.33

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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.