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Finding the Fourth Proportional to 281.61, 388.77 and 188.48

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Solution

The fourth proportional to 281.61, 388.77 and 188.48 is: 260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.61 : 388.77 = 188.48 : x
  2. Step 2: Convert to fraction form
    281.61/388.77 = 188.48/x
  3. Step 3: Cross multiply
    281.61x = 388.77 × 188.48
  4. Step 4: Simplify right side
    281.61x = 73,275.37
  5. Step 5: Solve for x
    x = 73,275.37/281.61
  6. Step 6: Final answer
    x = 260.20

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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.