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Finding the Fourth Proportional to 623,989.61, 861,630.56 and 394,950.95

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Solution

The fourth proportional to 623,989.61, 861,630.56 and 394,950.95 is: 545,364.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,989.61 : 861,630.56 = 394,950.95 : x
  2. Step 2: Convert to fraction form
    623,989.61/861,630.56 = 394,950.95/x
  3. Step 3: Cross multiply
    623,989.61x = 861,630.56 × 394,950.95
  4. Step 4: Simplify right side
    623,989.61x = 340,301,806,448.57
  5. Step 5: Solve for x
    x = 340,301,806,448.57/623,989.61
  6. Step 6: Final answer
    x = 545,364.54

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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.