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Finding the Fourth Proportional to 2,352.79, 3,529.73 and 891.91

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Solution

The fourth proportional to 2,352.79, 3,529.73 and 891.91 is: 1,338.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,352.79 : 3,529.73 = 891.91 : x
  2. Step 2: Convert to fraction form
    2,352.79/3,529.73 = 891.91/x
  3. Step 3: Cross multiply
    2,352.79x = 3,529.73 × 891.91
  4. Step 4: Simplify right side
    2,352.79x = 3,148,201.48
  5. Step 5: Solve for x
    x = 3,148,201.48/2,352.79
  6. Step 6: Final answer
    x = 1,338.07

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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.