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Finding the Fourth Proportional to 700.92, 967.32 and 390.42

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Solution

The fourth proportional to 700.92, 967.32 and 390.42 is: 538.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.92 : 967.32 = 390.42 : x
  2. Step 2: Convert to fraction form
    700.92/967.32 = 390.42/x
  3. Step 3: Cross multiply
    700.92x = 967.32 × 390.42
  4. Step 4: Simplify right side
    700.92x = 377,661.07
  5. Step 5: Solve for x
    x = 377,661.07/700.92
  6. Step 6: Final answer
    x = 538.81

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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.