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Finding the Fourth Proportional to 941.66, 1,412.41 and 421.64

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Solution

The fourth proportional to 941.66, 1,412.41 and 421.64 is: 632.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.66 : 1,412.41 = 421.64 : x
  2. Step 2: Convert to fraction form
    941.66/1,412.41 = 421.64/x
  3. Step 3: Cross multiply
    941.66x = 1,412.41 × 421.64
  4. Step 4: Simplify right side
    941.66x = 595,528.55
  5. Step 5: Solve for x
    x = 595,528.55/941.66
  6. Step 6: Final answer
    x = 632.42

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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.