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Finding the Fourth Proportional to 941.24, 1,412.42 and 393.40

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Solution

The fourth proportional to 941.24, 1,412.42 and 393.40 is: 590.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.24 : 1,412.42 = 393.40 : x
  2. Step 2: Convert to fraction form
    941.24/1,412.42 = 393.40/x
  3. Step 3: Cross multiply
    941.24x = 1,412.42 × 393.40
  4. Step 4: Simplify right side
    941.24x = 555,646.03
  5. Step 5: Solve for x
    x = 555,646.03/941.24
  6. Step 6: Final answer
    x = 590.33

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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.