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Finding the Fourth Proportional to 1,166.31, 1,609.40 and 668.87

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Solution

The fourth proportional to 1,166.31, 1,609.40 and 668.87 is: 922.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,166.31 : 1,609.40 = 668.87 : x
  2. Step 2: Convert to fraction form
    1,166.31/1,609.40 = 668.87/x
  3. Step 3: Cross multiply
    1,166.31x = 1,609.40 × 668.87
  4. Step 4: Simplify right side
    1,166.31x = 1,076,479.04
  5. Step 5: Solve for x
    x = 1,076,479.04/1,166.31
  6. Step 6: Final answer
    x = 922.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.