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Finding the Fourth Proportional to 700.82, 967.13 and 390.32

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Solution

The fourth proportional to 700.82, 967.13 and 390.32 is: 538.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.82 : 967.13 = 390.32 : x
  2. Step 2: Convert to fraction form
    700.82/967.13 = 390.32/x
  3. Step 3: Cross multiply
    700.82x = 967.13 × 390.32
  4. Step 4: Simplify right side
    700.82x = 377,483.39
  5. Step 5: Solve for x
    x = 377,483.39/700.82
  6. Step 6: Final answer
    x = 538.63

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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.