Home / 3,405.74-5,105.40-1,555.76

Finding the Fourth Proportional to 3,405.74, 5,105.40 and 1,555.76

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Solution

The fourth proportional to 3,405.74, 5,105.40 and 1,555.76 is: 2,332.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.74 : 5,105.40 = 1,555.76 : x
  2. Step 2: Convert to fraction form
    3,405.74/5,105.40 = 1,555.76/x
  3. Step 3: Cross multiply
    3,405.74x = 5,105.40 × 1,555.76
  4. Step 4: Simplify right side
    3,405.74x = 7,942,777.10
  5. Step 5: Solve for x
    x = 7,942,777.10/3,405.74
  6. Step 6: Final answer
    x = 2,332.17

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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.