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Finding the Fourth Proportional to 1,077.83, 1,615.37 and 938.44

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Solution

The fourth proportional to 1,077.83, 1,615.37 and 938.44 is: 1,406.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.83 : 1,615.37 = 938.44 : x
  2. Step 2: Convert to fraction form
    1,077.83/1,615.37 = 938.44/x
  3. Step 3: Cross multiply
    1,077.83x = 1,615.37 × 938.44
  4. Step 4: Simplify right side
    1,077.83x = 1,515,915.05
  5. Step 5: Solve for x
    x = 1,515,915.05/1,077.83
  6. Step 6: Final answer
    x = 1,406.45

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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.