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Finding the Fourth Proportional to 1,554.73, 2,331.49 and 688.44

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Solution

The fourth proportional to 1,554.73, 2,331.49 and 688.44 is: 1,032.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,554.73 : 2,331.49 = 688.44 : x
  2. Step 2: Convert to fraction form
    1,554.73/2,331.49 = 688.44/x
  3. Step 3: Cross multiply
    1,554.73x = 2,331.49 × 688.44
  4. Step 4: Simplify right side
    1,554.73x = 1,605,090.98
  5. Step 5: Solve for x
    x = 1,605,090.98/1,554.73
  6. Step 6: Final answer
    x = 1,032.39

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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.