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Finding the Fourth Proportional to 1,556.95, 2,147.99 and 997.33

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Solution

The fourth proportional to 1,556.95, 2,147.99 and 997.33 is: 1,375.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.95 : 2,147.99 = 997.33 : x
  2. Step 2: Convert to fraction form
    1,556.95/2,147.99 = 997.33/x
  3. Step 3: Cross multiply
    1,556.95x = 2,147.99 × 997.33
  4. Step 4: Simplify right side
    1,556.95x = 2,142,239.14
  5. Step 5: Solve for x
    x = 2,142,239.14/1,556.95
  6. Step 6: Final answer
    x = 1,375.92

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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.