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Finding the Fourth Proportional to 3,242.50, 4,863.49 and 870.39

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Solution

The fourth proportional to 3,242.50, 4,863.49 and 870.39 is: 1,305.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,242.50 : 4,863.49 = 870.39 : x
  2. Step 2: Convert to fraction form
    3,242.50/4,863.49 = 870.39/x
  3. Step 3: Cross multiply
    3,242.50x = 4,863.49 × 870.39
  4. Step 4: Simplify right side
    3,242.50x = 4,233,128.71
  5. Step 5: Solve for x
    x = 4,233,128.71/3,242.50
  6. Step 6: Final answer
    x = 1,305.51

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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.