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Finding the Fourth Proportional to 2,015.39, 3,023.30 and 554.55

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Solution

The fourth proportional to 2,015.39, 3,023.30 and 554.55 is: 831.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.39 : 3,023.30 = 554.55 : x
  2. Step 2: Convert to fraction form
    2,015.39/3,023.30 = 554.55/x
  3. Step 3: Cross multiply
    2,015.39x = 3,023.30 × 554.55
  4. Step 4: Simplify right side
    2,015.39x = 1,676,571.02
  5. Step 5: Solve for x
    x = 1,676,571.02/2,015.39
  6. Step 6: Final answer
    x = 831.88

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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.