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Finding the Fourth Proportional to 1,409.05, 2,111.97 and 627.88

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Solution

The fourth proportional to 1,409.05, 2,111.97 and 627.88 is: 941.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.05 : 2,111.97 = 627.88 : x
  2. Step 2: Convert to fraction form
    1,409.05/2,111.97 = 627.88/x
  3. Step 3: Cross multiply
    1,409.05x = 2,111.97 × 627.88
  4. Step 4: Simplify right side
    1,409.05x = 1,326,063.72
  5. Step 5: Solve for x
    x = 1,326,063.72/1,409.05
  6. Step 6: Final answer
    x = 941.10

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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.