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Finding the Fourth Proportional to 701.17, 967.61 and 390.67

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Solution

The fourth proportional to 701.17, 967.61 and 390.67 is: 539.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.17 : 967.61 = 390.67 : x
  2. Step 2: Convert to fraction form
    701.17/967.61 = 390.67/x
  3. Step 3: Cross multiply
    701.17x = 967.61 × 390.67
  4. Step 4: Simplify right side
    701.17x = 378,014.25
  5. Step 5: Solve for x
    x = 378,014.25/701.17
  6. Step 6: Final answer
    x = 539.12

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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.