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Finding the Fourth Proportional to 940.96, 1,287 and 925.84

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Solution

The fourth proportional to 940.96, 1,287 and 925.84 is: 1,266.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.96 : 1,287 = 925.84 : x
  2. Step 2: Convert to fraction form
    940.96/1,287 = 925.84/x
  3. Step 3: Cross multiply
    940.96x = 1,287 × 925.84
  4. Step 4: Simplify right side
    940.96x = 1,191,556.08
  5. Step 5: Solve for x
    x = 1,191,556.08/940.96
  6. Step 6: Final answer
    x = 1,266.32

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.