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Finding the Fourth Proportional to 573.66, 860.40 and 208.38

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Solution

The fourth proportional to 573.66, 860.40 and 208.38 is: 312.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.66 : 860.40 = 208.38 : x
  2. Step 2: Convert to fraction form
    573.66/860.40 = 208.38/x
  3. Step 3: Cross multiply
    573.66x = 860.40 × 208.38
  4. Step 4: Simplify right side
    573.66x = 179,290.15
  5. Step 5: Solve for x
    x = 179,290.15/573.66
  6. Step 6: Final answer
    x = 312.54

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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.