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Finding the Fourth Proportional to 263,277.60, 394,916.40 and 85,802.55

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Solution

The fourth proportional to 263,277.60, 394,916.40 and 85,802.55 is: 128,703.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,277.60 : 394,916.40 = 85,802.55 : x
  2. Step 2: Convert to fraction form
    263,277.60/394,916.40 = 85,802.55/x
  3. Step 3: Cross multiply
    263,277.60x = 394,916.40 × 85,802.55
  4. Step 4: Simplify right side
    263,277.60x = 33,884,834,156.82
  5. Step 5: Solve for x
    x = 33,884,834,156.82/263,277.60
  6. Step 6: Final answer
    x = 128,703.83

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1.5x scale

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.