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Finding the Fourth Proportional to 1,778.47, 2,668 and 608.55

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Solution

The fourth proportional to 1,778.47, 2,668 and 608.55 is: 912.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.47 : 2,668 = 608.55 : x
  2. Step 2: Convert to fraction form
    1,778.47/2,668 = 608.55/x
  3. Step 3: Cross multiply
    1,778.47x = 2,668 × 608.55
  4. Step 4: Simplify right side
    1,778.47x = 1,623,611.40
  5. Step 5: Solve for x
    x = 1,623,611.40/1,778.47
  6. Step 6: Final answer
    x = 912.93

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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.