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Finding the Fourth Proportional to 2,360.25, 3,542.00 and 821.25

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Solution

The fourth proportional to 2,360.25, 3,542.00 and 821.25 is: 1,232.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,360.25 : 3,542.00 = 821.25 : x
  2. Step 2: Convert to fraction form
    2,360.25/3,542.00 = 821.25/x
  3. Step 3: Cross multiply
    2,360.25x = 3,542.00 × 821.25
  4. Step 4: Simplify right side
    2,360.25x = 2,908,863.39
  5. Step 5: Solve for x
    x = 2,908,863.39/2,360.25
  6. Step 6: Final answer
    x = 1,232.44

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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.