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Finding the Fourth Proportional to 205.07, 282.56 and 155.86

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Solution

The fourth proportional to 205.07, 282.56 and 155.86 is: 214.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.07 : 282.56 = 155.86 : x
  2. Step 2: Convert to fraction form
    205.07/282.56 = 155.86/x
  3. Step 3: Cross multiply
    205.07x = 282.56 × 155.86
  4. Step 4: Simplify right side
    205.07x = 44,038.32
  5. Step 5: Solve for x
    x = 44,038.32/205.07
  6. Step 6: Final answer
    x = 214.75

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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.