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Finding the Fourth Proportional to 1,376.22, 2,063.86 and 554.28

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Solution

The fourth proportional to 1,376.22, 2,063.86 and 554.28 is: 831.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.22 : 2,063.86 = 554.28 : x
  2. Step 2: Convert to fraction form
    1,376.22/2,063.86 = 554.28/x
  3. Step 3: Cross multiply
    1,376.22x = 2,063.86 × 554.28
  4. Step 4: Simplify right side
    1,376.22x = 1,143,956.32
  5. Step 5: Solve for x
    x = 1,143,956.32/1,376.22
  6. Step 6: Final answer
    x = 831.23

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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.