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Finding the Fourth Proportional to 1,084.80, 1,623.54 and 902.55

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Solution

The fourth proportional to 1,084.80, 1,623.54 and 902.55 is: 1,350.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.80 : 1,623.54 = 902.55 : x
  2. Step 2: Convert to fraction form
    1,084.80/1,623.54 = 902.55/x
  3. Step 3: Cross multiply
    1,084.80x = 1,623.54 × 902.55
  4. Step 4: Simplify right side
    1,084.80x = 1,465,326.03
  5. Step 5: Solve for x
    x = 1,465,326.03/1,084.80
  6. Step 6: Final answer
    x = 1,350.78

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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.