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Finding the Fourth Proportional to 380.18, 570.15 and 197.48

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Solution

The fourth proportional to 380.18, 570.15 and 197.48 is: 296.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.18 : 570.15 = 197.48 : x
  2. Step 2: Convert to fraction form
    380.18/570.15 = 197.48/x
  3. Step 3: Cross multiply
    380.18x = 570.15 × 197.48
  4. Step 4: Simplify right side
    380.18x = 112,590.92
  5. Step 5: Solve for x
    x = 112,590.92/380.18
  6. Step 6: Final answer
    x = 296.15

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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.