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Finding the Fourth Proportional to 701, 967.40 and 390.52

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Solution

The fourth proportional to 701, 967.40 and 390.52 is: 538.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    701 : 967.40 = 390.52 : x
  2. Step 2: Convert to fraction form
    701/967.40 = 390.52/x
  3. Step 3: Cross multiply
    701x = 967.40 × 390.52
  4. Step 4: Simplify right side
    701x = 377,789.05
  5. Step 5: Solve for x
    x = 377,789.05/701
  6. Step 6: Final answer
    x = 538.93

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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.