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Finding the Fourth Proportional to 946.26, 1,304.43 and 665.58

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Solution

The fourth proportional to 946.26, 1,304.43 and 665.58 is: 917.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.26 : 1,304.43 = 665.58 : x
  2. Step 2: Convert to fraction form
    946.26/1,304.43 = 665.58/x
  3. Step 3: Cross multiply
    946.26x = 1,304.43 × 665.58
  4. Step 4: Simplify right side
    946.26x = 868,202.52
  5. Step 5: Solve for x
    x = 868,202.52/946.26
  6. Step 6: Final answer
    x = 917.51

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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.