Home / 1,487.18-2,231.37-664.89

Finding the Fourth Proportional to 1,487.18, 2,231.37 and 664.89

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Solution

The fourth proportional to 1,487.18, 2,231.37 and 664.89 is: 997.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.18 : 2,231.37 = 664.89 : x
  2. Step 2: Convert to fraction form
    1,487.18/2,231.37 = 664.89/x
  3. Step 3: Cross multiply
    1,487.18x = 2,231.37 × 664.89
  4. Step 4: Simplify right side
    1,487.18x = 1,483,615.60
  5. Step 5: Solve for x
    x = 1,483,615.60/1,487.18
  6. Step 6: Final answer
    x = 997.61

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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.