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Finding the Fourth Proportional to 638,781.42, 956,535.84 and 619,861.44

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Solution

The fourth proportional to 638,781.42, 956,535.84 and 619,861.44 is: 928,204.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,781.42 : 956,535.84 = 619,861.44 : x
  2. Step 2: Convert to fraction form
    638,781.42/956,535.84 = 619,861.44/x
  3. Step 3: Cross multiply
    638,781.42x = 956,535.84 × 619,861.44
  4. Step 4: Simplify right side
    638,781.42x = 592,919,683,194.01
  5. Step 5: Solve for x
    x = 592,919,683,194.01/638,781.42
  6. Step 6: Final answer
    x = 928,204.34

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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.