Home / 3,105.12-4,657.80-1,256.40

Finding the Fourth Proportional to 3,105.12, 4,657.80 and 1,256.40

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Solution

The fourth proportional to 3,105.12, 4,657.80 and 1,256.40 is: 1,884.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.12 : 4,657.80 = 1,256.40 : x
  2. Step 2: Convert to fraction form
    3,105.12/4,657.80 = 1,256.40/x
  3. Step 3: Cross multiply
    3,105.12x = 4,657.80 × 1,256.40
  4. Step 4: Simplify right side
    3,105.12x = 5,852,059.92
  5. Step 5: Solve for x
    x = 5,852,059.92/3,105.12
  6. Step 6: Final answer
    x = 1,884.65

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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.