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Finding the Fourth Proportional to 298.16, 411.68 and 193.28

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Solution

The fourth proportional to 298.16, 411.68 and 193.28 is: 266.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.16 : 411.68 = 193.28 : x
  2. Step 2: Convert to fraction form
    298.16/411.68 = 193.28/x
  3. Step 3: Cross multiply
    298.16x = 411.68 × 193.28
  4. Step 4: Simplify right side
    298.16x = 79,569.51
  5. Step 5: Solve for x
    x = 79,569.51/298.16
  6. Step 6: Final answer
    x = 266.87

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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.