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Finding the Fourth Proportional to 1,851.73, 2,777.64 and 619.12

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Solution

The fourth proportional to 1,851.73, 2,777.64 and 619.12 is: 928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.73 : 2,777.64 = 619.12 : x
  2. Step 2: Convert to fraction form
    1,851.73/2,777.64 = 619.12/x
  3. Step 3: Cross multiply
    1,851.73x = 2,777.64 × 619.12
  4. Step 4: Simplify right side
    1,851.73x = 1,719,692.48
  5. Step 5: Solve for x
    x = 1,719,692.48/1,851.73
  6. Step 6: Final answer
    x = 928.70

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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.