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Finding the Fourth Proportional to 2,056.70, 3,085.23 and 669.68

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Solution

The fourth proportional to 2,056.70, 3,085.23 and 669.68 is: 1,004.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,056.70 : 3,085.23 = 669.68 : x
  2. Step 2: Convert to fraction form
    2,056.70/3,085.23 = 669.68/x
  3. Step 3: Cross multiply
    2,056.70x = 3,085.23 × 669.68
  4. Step 4: Simplify right side
    2,056.70x = 2,066,101.40
  5. Step 5: Solve for x
    x = 2,066,101.40/2,056.70
  6. Step 6: Final answer
    x = 1,004.57

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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.