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Finding the Fourth Proportional to 2,668.06, 4,002.30 and 913.90

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Solution

The fourth proportional to 2,668.06, 4,002.30 and 913.90 is: 1,370.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.06 : 4,002.30 = 913.90 : x
  2. Step 2: Convert to fraction form
    2,668.06/4,002.30 = 913.90/x
  3. Step 3: Cross multiply
    2,668.06x = 4,002.30 × 913.90
  4. Step 4: Simplify right side
    2,668.06x = 3,657,701.97
  5. Step 5: Solve for x
    x = 3,657,701.97/2,668.06
  6. Step 6: Final answer
    x = 1,370.92

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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.