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Finding the Fourth Proportional to 1,342.44, 1,852.26 and 782.64

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Solution

The fourth proportional to 1,342.44, 1,852.26 and 782.64 is: 1,079.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,342.44 : 1,852.26 = 782.64 : x
  2. Step 2: Convert to fraction form
    1,342.44/1,852.26 = 782.64/x
  3. Step 3: Cross multiply
    1,342.44x = 1,852.26 × 782.64
  4. Step 4: Simplify right side
    1,342.44x = 1,449,652.77
  5. Step 5: Solve for x
    x = 1,449,652.77/1,342.44
  6. Step 6: Final answer
    x = 1,079.86

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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.