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Finding the Fourth Proportional to 1,768.79, 2,653.18 and 614.54

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Solution

The fourth proportional to 1,768.79, 2,653.18 and 614.54 is: 921.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.79 : 2,653.18 = 614.54 : x
  2. Step 2: Convert to fraction form
    1,768.79/2,653.18 = 614.54/x
  3. Step 3: Cross multiply
    1,768.79x = 2,653.18 × 614.54
  4. Step 4: Simplify right side
    1,768.79x = 1,630,490.33
  5. Step 5: Solve for x
    x = 1,630,490.33/1,768.79
  6. Step 6: Final answer
    x = 921.81

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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.