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Finding the Fourth Proportional to 619.41, 933.30 and 553.11

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Solution

The fourth proportional to 619.41, 933.30 and 553.11 is: 833.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.41 : 933.30 = 553.11 : x
  2. Step 2: Convert to fraction form
    619.41/933.30 = 553.11/x
  3. Step 3: Cross multiply
    619.41x = 933.30 × 553.11
  4. Step 4: Simplify right side
    619.41x = 516,217.56
  5. Step 5: Solve for x
    x = 516,217.56/619.41
  6. Step 6: Final answer
    x = 833.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.