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Finding the Fourth Proportional to 573.98, 860.45 and 208.51

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Solution

The fourth proportional to 573.98, 860.45 and 208.51 is: 312.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.98 : 860.45 = 208.51 : x
  2. Step 2: Convert to fraction form
    573.98/860.45 = 208.51/x
  3. Step 3: Cross multiply
    573.98x = 860.45 × 208.51
  4. Step 4: Simplify right side
    573.98x = 179,414.33
  5. Step 5: Solve for x
    x = 179,414.33/573.98
  6. Step 6: Final answer
    x = 312.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.