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Finding the Fourth Proportional to 1,921.17, 2,881.11 and 622.35

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Solution

The fourth proportional to 1,921.17, 2,881.11 and 622.35 is: 933.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.17 : 2,881.11 = 622.35 : x
  2. Step 2: Convert to fraction form
    1,921.17/2,881.11 = 622.35/x
  3. Step 3: Cross multiply
    1,921.17x = 2,881.11 × 622.35
  4. Step 4: Simplify right side
    1,921.17x = 1,793,058.81
  5. Step 5: Solve for x
    x = 1,793,058.81/1,921.17
  6. Step 6: Final answer
    x = 933.32

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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.