Home / 2,107.60-2,908.48-1,223.68

Finding the Fourth Proportional to 2,107.60, 2,908.48 and 1,223.68

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Solution

The fourth proportional to 2,107.60, 2,908.48 and 1,223.68 is: 1,688.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.60 : 2,908.48 = 1,223.68 : x
  2. Step 2: Convert to fraction form
    2,107.60/2,908.48 = 1,223.68/x
  3. Step 3: Cross multiply
    2,107.60x = 2,908.48 × 1,223.68
  4. Step 4: Simplify right side
    2,107.60x = 3,559,048.81
  5. Step 5: Solve for x
    x = 3,559,048.81/2,107.60
  6. Step 6: Final answer
    x = 1,688.67

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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.