Home / 2,113.50-2,917.79-1,405.88

Finding the Fourth Proportional to 2,113.50, 2,917.79 and 1,405.88

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Solution

The fourth proportional to 2,113.50, 2,917.79 and 1,405.88 is: 1,940.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.50 : 2,917.79 = 1,405.88 : x
  2. Step 2: Convert to fraction form
    2,113.50/2,917.79 = 1,405.88/x
  3. Step 3: Cross multiply
    2,113.50x = 2,917.79 × 1,405.88
  4. Step 4: Simplify right side
    2,113.50x = 4,102,040.99
  5. Step 5: Solve for x
    x = 4,102,040.99/2,113.50
  6. Step 6: Final answer
    x = 1,940.88

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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.