Home / 1,438.22-1,985.58-966.96

Finding the Fourth Proportional to 1,438.22, 1,985.58 and 966.96

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Solution

The fourth proportional to 1,438.22, 1,985.58 and 966.96 is: 1,334.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.22 : 1,985.58 = 966.96 : x
  2. Step 2: Convert to fraction form
    1,438.22/1,985.58 = 966.96/x
  3. Step 3: Cross multiply
    1,438.22x = 1,985.58 × 966.96
  4. Step 4: Simplify right side
    1,438.22x = 1,919,976.44
  5. Step 5: Solve for x
    x = 1,919,976.44/1,438.22
  6. Step 6: Final answer
    x = 1,334.97

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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.