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Finding the Fourth Proportional to 1,668.80, 2,499.55 and 845.66

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Solution

The fourth proportional to 1,668.80, 2,499.55 and 845.66 is: 1,266.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.80 : 2,499.55 = 845.66 : x
  2. Step 2: Convert to fraction form
    1,668.80/2,499.55 = 845.66/x
  3. Step 3: Cross multiply
    1,668.80x = 2,499.55 × 845.66
  4. Step 4: Simplify right side
    1,668.80x = 2,113,752.73
  5. Step 5: Solve for x
    x = 2,113,752.73/1,668.80
  6. Step 6: Final answer
    x = 1,266.63

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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.