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Finding the Fourth Proportional to 2,668.46, 4,000.80 and 912.62

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Solution

The fourth proportional to 2,668.46, 4,000.80 and 912.62 is: 1,368.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.46 : 4,000.80 = 912.62 : x
  2. Step 2: Convert to fraction form
    2,668.46/4,000.80 = 912.62/x
  3. Step 3: Cross multiply
    2,668.46x = 4,000.80 × 912.62
  4. Step 4: Simplify right side
    2,668.46x = 3,651,190.09
  5. Step 5: Solve for x
    x = 3,651,190.09/2,668.46
  6. Step 6: Final answer
    x = 1,368.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.