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Finding the Fourth Proportional to 3,139.54, 4,709.40 and 948.27

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Solution

The fourth proportional to 3,139.54, 4,709.40 and 948.27 is: 1,422.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.54 : 4,709.40 = 948.27 : x
  2. Step 2: Convert to fraction form
    3,139.54/4,709.40 = 948.27/x
  3. Step 3: Cross multiply
    3,139.54x = 4,709.40 × 948.27
  4. Step 4: Simplify right side
    3,139.54x = 4,465,777.64
  5. Step 5: Solve for x
    x = 4,465,777.64/3,139.54
  6. Step 6: Final answer
    x = 1,422.43

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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.