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Finding the Fourth Proportional to 281.50, 388.44 and 157.16

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Solution

The fourth proportional to 281.50, 388.44 and 157.16 is: 216.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.50 : 388.44 = 157.16 : x
  2. Step 2: Convert to fraction form
    281.50/388.44 = 157.16/x
  3. Step 3: Cross multiply
    281.50x = 388.44 × 157.16
  4. Step 4: Simplify right side
    281.50x = 61,047.23
  5. Step 5: Solve for x
    x = 61,047.23/281.50
  6. Step 6: Final answer
    x = 216.86

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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.