Home / 1,668.40-2,302.68-1,228.57

Finding the Fourth Proportional to 1,668.40, 2,302.68 and 1,228.57

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Solution

The fourth proportional to 1,668.40, 2,302.68 and 1,228.57 is: 1,695.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.40 : 2,302.68 = 1,228.57 : x
  2. Step 2: Convert to fraction form
    1,668.40/2,302.68 = 1,228.57/x
  3. Step 3: Cross multiply
    1,668.40x = 2,302.68 × 1,228.57
  4. Step 4: Simplify right side
    1,668.40x = 2,829,003.57
  5. Step 5: Solve for x
    x = 2,829,003.57/1,668.40
  6. Step 6: Final answer
    x = 1,695.64

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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.