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Finding the Fourth Proportional to 2,352.28, 3,528.42 and 813.40

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Solution

The fourth proportional to 2,352.28, 3,528.42 and 813.40 is: 1,220.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,352.28 : 3,528.42 = 813.40 : x
  2. Step 2: Convert to fraction form
    2,352.28/3,528.42 = 813.40/x
  3. Step 3: Cross multiply
    2,352.28x = 3,528.42 × 813.40
  4. Step 4: Simplify right side
    2,352.28x = 2,870,016.83
  5. Step 5: Solve for x
    x = 2,870,016.83/2,352.28
  6. Step 6: Final answer
    x = 1,220.10

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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.