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Finding the Fourth Proportional to 281.68, 388.55 and 204.10

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Solution

The fourth proportional to 281.68, 388.55 and 204.10 is: 281.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.68 : 388.55 = 204.10 : x
  2. Step 2: Convert to fraction form
    281.68/388.55 = 204.10/x
  3. Step 3: Cross multiply
    281.68x = 388.55 × 204.10
  4. Step 4: Simplify right side
    281.68x = 79,303.06
  5. Step 5: Solve for x
    x = 79,303.06/281.68
  6. Step 6: Final answer
    x = 281.54

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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.