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Finding the Fourth Proportional to 517,339.07, 713,922.76 and 287,892.43

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Solution

The fourth proportional to 517,339.07, 713,922.76 and 287,892.43 is: 397,288.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,339.07 : 713,922.76 = 287,892.43 : x
  2. Step 2: Convert to fraction form
    517,339.07/713,922.76 = 287,892.43/x
  3. Step 3: Cross multiply
    517,339.07x = 713,922.76 × 287,892.43
  4. Step 4: Simplify right side
    517,339.07x = 205,532,956,783.77
  5. Step 5: Solve for x
    x = 205,532,956,783.77/517,339.07
  6. Step 6: Final answer
    x = 397,288.68

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Double scale
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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.