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Finding the Fourth Proportional to 1,360.89, 1,877.45 and 829.58

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Solution

The fourth proportional to 1,360.89, 1,877.45 and 829.58 is: 1,144.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.89 : 1,877.45 = 829.58 : x
  2. Step 2: Convert to fraction form
    1,360.89/1,877.45 = 829.58/x
  3. Step 3: Cross multiply
    1,360.89x = 1,877.45 × 829.58
  4. Step 4: Simplify right side
    1,360.89x = 1,557,481.44
  5. Step 5: Solve for x
    x = 1,557,481.44/1,360.89
  6. Step 6: Final answer
    x = 1,144.46

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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.