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Finding the Fourth Proportional to 1,102.98, 1,522.08 and 955.56

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Solution

The fourth proportional to 1,102.98, 1,522.08 and 955.56 is: 1,318.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,102.98 : 1,522.08 = 955.56 : x
  2. Step 2: Convert to fraction form
    1,102.98/1,522.08 = 955.56/x
  3. Step 3: Cross multiply
    1,102.98x = 1,522.08 × 955.56
  4. Step 4: Simplify right side
    1,102.98x = 1,454,438.76
  5. Step 5: Solve for x
    x = 1,454,438.76/1,102.98
  6. Step 6: Final answer
    x = 1,318.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.