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Finding the Fourth Proportional to 1,551.53, 2,141.08 and 879.33

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Solution

The fourth proportional to 1,551.53, 2,141.08 and 879.33 is: 1,213.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.53 : 2,141.08 = 879.33 : x
  2. Step 2: Convert to fraction form
    1,551.53/2,141.08 = 879.33/x
  3. Step 3: Cross multiply
    1,551.53x = 2,141.08 × 879.33
  4. Step 4: Simplify right side
    1,551.53x = 1,882,715.88
  5. Step 5: Solve for x
    x = 1,882,715.88/1,551.53
  6. Step 6: Final answer
    x = 1,213.46

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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.