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Finding the Fourth Proportional to 2,172.64, 3,258.94 and 529.21

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Solution

The fourth proportional to 2,172.64, 3,258.94 and 529.21 is: 793.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.64 : 3,258.94 = 529.21 : x
  2. Step 2: Convert to fraction form
    2,172.64/3,258.94 = 529.21/x
  3. Step 3: Cross multiply
    2,172.64x = 3,258.94 × 529.21
  4. Step 4: Simplify right side
    2,172.64x = 1,724,663.64
  5. Step 5: Solve for x
    x = 1,724,663.64/2,172.64
  6. Step 6: Final answer
    x = 793.81

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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.