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Finding the Fourth Proportional to 643,688.60, 965,617.70 and 238,825.72

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Solution

The fourth proportional to 643,688.60, 965,617.70 and 238,825.72 is: 358,270.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,688.60 : 965,617.70 = 238,825.72 : x
  2. Step 2: Convert to fraction form
    643,688.60/965,617.70 = 238,825.72/x
  3. Step 3: Cross multiply
    643,688.60x = 965,617.70 × 238,825.72
  4. Step 4: Simplify right side
    643,688.60x = 230,614,342,447.24
  5. Step 5: Solve for x
    x = 230,614,342,447.24/643,688.60
  6. Step 6: Final answer
    x = 358,270.04

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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.