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Finding the Fourth Proportional to 1,347.58, 2,020.29 and 762.22

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Solution

The fourth proportional to 1,347.58, 2,020.29 and 762.22 is: 1,142.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.58 : 2,020.29 = 762.22 : x
  2. Step 2: Convert to fraction form
    1,347.58/2,020.29 = 762.22/x
  3. Step 3: Cross multiply
    1,347.58x = 2,020.29 × 762.22
  4. Step 4: Simplify right side
    1,347.58x = 1,539,905.44
  5. Step 5: Solve for x
    x = 1,539,905.44/1,347.58
  6. Step 6: Final answer
    x = 1,142.72

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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.