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Finding the Fourth Proportional to 1,772.44, 2,445.96 and 986.64

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Solution

The fourth proportional to 1,772.44, 2,445.96 and 986.64 is: 1,361.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.44 : 2,445.96 = 986.64 : x
  2. Step 2: Convert to fraction form
    1,772.44/2,445.96 = 986.64/x
  3. Step 3: Cross multiply
    1,772.44x = 2,445.96 × 986.64
  4. Step 4: Simplify right side
    1,772.44x = 2,413,276.50
  5. Step 5: Solve for x
    x = 2,413,276.50/1,772.44
  6. Step 6: Final answer
    x = 1,361.56

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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.