Home / 2,905.67-4,009.80-1,911.50

Finding the Fourth Proportional to 2,905.67, 4,009.80 and 1,911.50

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Solution

The fourth proportional to 2,905.67, 4,009.80 and 1,911.50 is: 2,637.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,905.67 : 4,009.80 = 1,911.50 : x
  2. Step 2: Convert to fraction form
    2,905.67/4,009.80 = 1,911.50/x
  3. Step 3: Cross multiply
    2,905.67x = 4,009.80 × 1,911.50
  4. Step 4: Simplify right side
    2,905.67x = 7,664,734.86
  5. Step 5: Solve for x
    x = 7,664,734.86/2,905.67
  6. Step 6: Final answer
    x = 2,637.85

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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.