Home / 2,905.89-4,005.90-1,909.46

Finding the Fourth Proportional to 2,905.89, 4,005.90 and 1,909.46

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Solution

The fourth proportional to 2,905.89, 4,005.90 and 1,909.46 is: 2,632.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,905.89 : 4,005.90 = 1,909.46 : x
  2. Step 2: Convert to fraction form
    2,905.89/4,005.90 = 1,909.46/x
  3. Step 3: Cross multiply
    2,905.89x = 4,005.90 × 1,909.46
  4. Step 4: Simplify right side
    2,905.89x = 7,649,085.78
  5. Step 5: Solve for x
    x = 7,649,085.78/2,905.89
  6. Step 6: Final answer
    x = 2,632.27

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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.