Home / 3,138.12-4,705.92-946.80

Finding the Fourth Proportional to 3,138.12, 4,705.92 and 946.80

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Solution

The fourth proportional to 3,138.12, 4,705.92 and 946.80 is: 1,419.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.12 : 4,705.92 = 946.80 : x
  2. Step 2: Convert to fraction form
    3,138.12/4,705.92 = 946.80/x
  3. Step 3: Cross multiply
    3,138.12x = 4,705.92 × 946.80
  4. Step 4: Simplify right side
    3,138.12x = 4,455,565.06
  5. Step 5: Solve for x
    x = 4,455,565.06/3,138.12
  6. Step 6: Final answer
    x = 1,419.82

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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.