Home / 2,289.92-3,160.14-1,405.20

Finding the Fourth Proportional to 2,289.92, 3,160.14 and 1,405.20

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Solution

The fourth proportional to 2,289.92, 3,160.14 and 1,405.20 is: 1,939.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.92 : 3,160.14 = 1,405.20 : x
  2. Step 2: Convert to fraction form
    2,289.92/3,160.14 = 1,405.20/x
  3. Step 3: Cross multiply
    2,289.92x = 3,160.14 × 1,405.20
  4. Step 4: Simplify right side
    2,289.92x = 4,440,628.73
  5. Step 5: Solve for x
    x = 4,440,628.73/2,289.92
  6. Step 6: Final answer
    x = 1,939.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.