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Finding the Fourth Proportional to 1,556.43, 2,335.07 and 816.09

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Solution

The fourth proportional to 1,556.43, 2,335.07 and 816.09 is: 1,224.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.43 : 2,335.07 = 816.09 : x
  2. Step 2: Convert to fraction form
    1,556.43/2,335.07 = 816.09/x
  3. Step 3: Cross multiply
    1,556.43x = 2,335.07 × 816.09
  4. Step 4: Simplify right side
    1,556.43x = 1,905,627.28
  5. Step 5: Solve for x
    x = 1,905,627.28/1,556.43
  6. Step 6: Final answer
    x = 1,224.36

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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.