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Finding the Fourth Proportional to 633,435.27, 873,809.42 and 391,640.55

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Solution

The fourth proportional to 633,435.27, 873,809.42 and 391,640.55 is: 540,259.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,435.27 : 873,809.42 = 391,640.55 : x
  2. Step 2: Convert to fraction form
    633,435.27/873,809.42 = 391,640.55/x
  3. Step 3: Cross multiply
    633,435.27x = 873,809.42 × 391,640.55
  4. Step 4: Simplify right side
    633,435.27x = 342,219,199,885.78
  5. Step 5: Solve for x
    x = 342,219,199,885.78/633,435.27
  6. Step 6: Final answer
    x = 540,259.15

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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.