Home / 3,409.20-4,707.72-2,289.78

Finding the Fourth Proportional to 3,409.20, 4,707.72 and 2,289.78

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Solution

The fourth proportional to 3,409.20, 4,707.72 and 2,289.78 is: 3,161.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.20 : 4,707.72 = 2,289.78 : x
  2. Step 2: Convert to fraction form
    3,409.20/4,707.72 = 2,289.78/x
  3. Step 3: Cross multiply
    3,409.20x = 4,707.72 × 2,289.78
  4. Step 4: Simplify right side
    3,409.20x = 10,779,643.10
  5. Step 5: Solve for x
    x = 10,779,643.10/3,409.20
  6. Step 6: Final answer
    x = 3,161.93

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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.