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Finding the Fourth Proportional to 1,491.39, 2,235.27 and 668.54

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Solution

The fourth proportional to 1,491.39, 2,235.27 and 668.54 is: 1,001.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.39 : 2,235.27 = 668.54 : x
  2. Step 2: Convert to fraction form
    1,491.39/2,235.27 = 668.54/x
  3. Step 3: Cross multiply
    1,491.39x = 2,235.27 × 668.54
  4. Step 4: Simplify right side
    1,491.39x = 1,494,356.23
  5. Step 5: Solve for x
    x = 1,494,356.23/1,491.39
  6. Step 6: Final answer
    x = 1,001.99

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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.