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Finding the Fourth Proportional to 3,099.28, 4,648.44 and 907.78

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Solution

The fourth proportional to 3,099.28, 4,648.44 and 907.78 is: 1,361.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,099.28 : 4,648.44 = 907.78 : x
  2. Step 2: Convert to fraction form
    3,099.28/4,648.44 = 907.78/x
  3. Step 3: Cross multiply
    3,099.28x = 4,648.44 × 907.78
  4. Step 4: Simplify right side
    3,099.28x = 4,219,760.86
  5. Step 5: Solve for x
    x = 4,219,760.86/3,099.28
  6. Step 6: Final answer
    x = 1,361.53

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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.