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Finding the Fourth Proportional to 205.60, 287.30 and 205.60

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Solution

The fourth proportional to 205.60, 287.30 and 205.60 is: 287.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.60 : 287.30 = 205.60 : x
  2. Step 2: Convert to fraction form
    205.60/287.30 = 205.60/x
  3. Step 3: Cross multiply
    205.60x = 287.30 × 205.60
  4. Step 4: Simplify right side
    205.60x = 59,068.88
  5. Step 5: Solve for x
    x = 59,068.88/205.60
  6. Step 6: Final answer
    x = 287.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.