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Finding the Fourth Proportional to 701.14, 967.40 and 390.64

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Solution

The fourth proportional to 701.14, 967.40 and 390.64 is: 538.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.14 : 967.40 = 390.64 : x
  2. Step 2: Convert to fraction form
    701.14/967.40 = 390.64/x
  3. Step 3: Cross multiply
    701.14x = 967.40 × 390.64
  4. Step 4: Simplify right side
    701.14x = 377,905.14
  5. Step 5: Solve for x
    x = 377,905.14/701.14
  6. Step 6: Final answer
    x = 538.99

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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.