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Finding the Fourth Proportional to 2,625.20, 3,935.02 and 869.75

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Solution

The fourth proportional to 2,625.20, 3,935.02 and 869.75 is: 1,303.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,625.20 : 3,935.02 = 869.75 : x
  2. Step 2: Convert to fraction form
    2,625.20/3,935.02 = 869.75/x
  3. Step 3: Cross multiply
    2,625.20x = 3,935.02 × 869.75
  4. Step 4: Simplify right side
    2,625.20x = 3,422,483.65
  5. Step 5: Solve for x
    x = 3,422,483.65/2,625.20
  6. Step 6: Final answer
    x = 1,303.70

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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.