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Finding the Fourth Proportional to 1,554.22, 2,144.91 and 891.01

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Solution

The fourth proportional to 1,554.22, 2,144.91 and 891.01 is: 1,229.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,554.22 : 2,144.91 = 891.01 : x
  2. Step 2: Convert to fraction form
    1,554.22/2,144.91 = 891.01/x
  3. Step 3: Cross multiply
    1,554.22x = 2,144.91 × 891.01
  4. Step 4: Simplify right side
    1,554.22x = 1,911,136.26
  5. Step 5: Solve for x
    x = 1,911,136.26/1,554.22
  6. Step 6: Final answer
    x = 1,229.64

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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.