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Finding the Fourth Proportional to 940.27, 1,409.64 and 631.18

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Solution

The fourth proportional to 940.27, 1,409.64 and 631.18 is: 946.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.27 : 1,409.64 = 631.18 : x
  2. Step 2: Convert to fraction form
    940.27/1,409.64 = 631.18/x
  3. Step 3: Cross multiply
    940.27x = 1,409.64 × 631.18
  4. Step 4: Simplify right side
    940.27x = 889,736.58
  5. Step 5: Solve for x
    x = 889,736.58/940.27
  6. Step 6: Final answer
    x = 946.26

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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.