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Finding the Fourth Proportional to 3,130.36, 4,695.55 and 939.09

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Solution

The fourth proportional to 3,130.36, 4,695.55 and 939.09 is: 1,408.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.36 : 4,695.55 = 939.09 : x
  2. Step 2: Convert to fraction form
    3,130.36/4,695.55 = 939.09/x
  3. Step 3: Cross multiply
    3,130.36x = 4,695.55 × 939.09
  4. Step 4: Simplify right side
    3,130.36x = 4,409,544.05
  5. Step 5: Solve for x
    x = 4,409,544.05/3,130.36
  6. Step 6: Final answer
    x = 1,408.64

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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.