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Finding the Fourth Proportional to 2,749.89, 4,124.85 and 669.90

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Solution

The fourth proportional to 2,749.89, 4,124.85 and 669.90 is: 1,004.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,749.89 : 4,124.85 = 669.90 : x
  2. Step 2: Convert to fraction form
    2,749.89/4,124.85 = 669.90/x
  3. Step 3: Cross multiply
    2,749.89x = 4,124.85 × 669.90
  4. Step 4: Simplify right side
    2,749.89x = 2,763,226.77
  5. Step 5: Solve for x
    x = 2,763,226.77/2,749.89
  6. Step 6: Final answer
    x = 1,004.85

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1.5x scale

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.