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Finding the Fourth Proportional to 638,458.60, 957,687.90 and 535,815.40

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Solution

The fourth proportional to 638,458.60, 957,687.90 and 535,815.40 is: 803,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,458.60 : 957,687.90 = 535,815.40 : x
  2. Step 2: Convert to fraction form
    638,458.60/957,687.90 = 535,815.40/x
  3. Step 3: Cross multiply
    638,458.60x = 957,687.90 × 535,815.40
  4. Step 4: Simplify right side
    638,458.60x = 513,143,925,213.66
  5. Step 5: Solve for x
    x = 513,143,925,213.66/638,458.60
  6. Step 6: Final answer
    x = 803,723.10

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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.