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Finding the Fourth Proportional to 430,901.64, 644,300.46 and 393,257.70

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Solution

The fourth proportional to 430,901.64, 644,300.46 and 393,257.70 is: 588,013.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,901.64 : 644,300.46 = 393,257.70 : x
  2. Step 2: Convert to fraction form
    430,901.64/644,300.46 = 393,257.70/x
  3. Step 3: Cross multiply
    430,901.64x = 644,300.46 × 393,257.70
  4. Step 4: Simplify right side
    430,901.64x = 253,376,117,008.54
  5. Step 5: Solve for x
    x = 253,376,117,008.54/430,901.64
  6. Step 6: Final answer
    x = 588,013.81

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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.