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Finding the Fourth Proportional to 2,669.84, 4,004.76 and 939.68

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Solution

The fourth proportional to 2,669.84, 4,004.76 and 939.68 is: 1,409.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,669.84 : 4,004.76 = 939.68 : x
  2. Step 2: Convert to fraction form
    2,669.84/4,004.76 = 939.68/x
  3. Step 3: Cross multiply
    2,669.84x = 4,004.76 × 939.68
  4. Step 4: Simplify right side
    2,669.84x = 3,763,192.88
  5. Step 5: Solve for x
    x = 3,763,192.88/2,669.84
  6. Step 6: Final answer
    x = 1,409.52

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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.