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Finding the Fourth Proportional to 1,487.66, 2,231.89 and 622.58

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Solution

The fourth proportional to 1,487.66, 2,231.89 and 622.58 is: 934.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.66 : 2,231.89 = 622.58 : x
  2. Step 2: Convert to fraction form
    1,487.66/2,231.89 = 622.58/x
  3. Step 3: Cross multiply
    1,487.66x = 2,231.89 × 622.58
  4. Step 4: Simplify right side
    1,487.66x = 1,389,517.36
  5. Step 5: Solve for x
    x = 1,389,517.36/1,487.66
  6. Step 6: Final answer
    x = 934.03

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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.