Home / 3,478.51-5,219.81-1,288.76

Finding the Fourth Proportional to 3,478.51, 5,219.81 and 1,288.76

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Solution

The fourth proportional to 3,478.51, 5,219.81 and 1,288.76 is: 1,933.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.51 : 5,219.81 = 1,288.76 : x
  2. Step 2: Convert to fraction form
    3,478.51/5,219.81 = 1,288.76/x
  3. Step 3: Cross multiply
    3,478.51x = 5,219.81 × 1,288.76
  4. Step 4: Simplify right side
    3,478.51x = 6,727,093.77
  5. Step 5: Solve for x
    x = 6,727,093.77/3,478.51
  6. Step 6: Final answer
    x = 1,933.90

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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.