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Finding the Fourth Proportional to 2,086, 3,128.46 and 624.76

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Solution

The fourth proportional to 2,086, 3,128.46 and 624.76 is: 936.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086 : 3,128.46 = 624.76 : x
  2. Step 2: Convert to fraction form
    2,086/3,128.46 = 624.76/x
  3. Step 3: Cross multiply
    2,086x = 3,128.46 × 624.76
  4. Step 4: Simplify right side
    2,086x = 1,954,536.67
  5. Step 5: Solve for x
    x = 1,954,536.67/2,086
  6. Step 6: Final answer
    x = 936.98

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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.