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Finding the Fourth Proportional to 941.78, 1,412.76 and 393.62

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Solution

The fourth proportional to 941.78, 1,412.76 and 393.62 is: 590.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.78 : 1,412.76 = 393.62 : x
  2. Step 2: Convert to fraction form
    941.78/1,412.76 = 393.62/x
  3. Step 3: Cross multiply
    941.78x = 1,412.76 × 393.62
  4. Step 4: Simplify right side
    941.78x = 556,090.59
  5. Step 5: Solve for x
    x = 556,090.59/941.78
  6. Step 6: Final answer
    x = 590.47

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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.