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Finding the Fourth Proportional to 380.93, 570.18 and 198.07

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Solution

The fourth proportional to 380.93, 570.18 and 198.07 is: 296.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.93 : 570.18 = 198.07 : x
  2. Step 2: Convert to fraction form
    380.93/570.18 = 198.07/x
  3. Step 3: Cross multiply
    380.93x = 570.18 × 198.07
  4. Step 4: Simplify right side
    380.93x = 112,935.55
  5. Step 5: Solve for x
    x = 112,935.55/380.93
  6. Step 6: Final answer
    x = 296.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.