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Finding the Fourth Proportional to 2,189.75, 3,282.59 and 802.76

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Solution

The fourth proportional to 2,189.75, 3,282.59 and 802.76 is: 1,203.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.75 : 3,282.59 = 802.76 : x
  2. Step 2: Convert to fraction form
    2,189.75/3,282.59 = 802.76/x
  3. Step 3: Cross multiply
    2,189.75x = 3,282.59 × 802.76
  4. Step 4: Simplify right side
    2,189.75x = 2,635,117.54
  5. Step 5: Solve for x
    x = 2,635,117.54/2,189.75
  6. Step 6: Final answer
    x = 1,203.39

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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.