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Finding the Fourth Proportional to 701.12, 967.32 and 390.56

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Solution

The fourth proportional to 701.12, 967.32 and 390.56 is: 538.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.12 : 967.32 = 390.56 : x
  2. Step 2: Convert to fraction form
    701.12/967.32 = 390.56/x
  3. Step 3: Cross multiply
    701.12x = 967.32 × 390.56
  4. Step 4: Simplify right side
    701.12x = 377,796.50
  5. Step 5: Solve for x
    x = 377,796.50/701.12
  6. Step 6: Final answer
    x = 538.85

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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.