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Finding the Fourth Proportional to 701.55, 968.09 and 421.72

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Solution

The fourth proportional to 701.55, 968.09 and 421.72 is: 581.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.55 : 968.09 = 421.72 : x
  2. Step 2: Convert to fraction form
    701.55/968.09 = 421.72/x
  3. Step 3: Cross multiply
    701.55x = 968.09 × 421.72
  4. Step 4: Simplify right side
    701.55x = 408,258.39
  5. Step 5: Solve for x
    x = 408,258.39/701.55
  6. Step 6: Final answer
    x = 581.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.