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Finding the Fourth Proportional to 573.85, 860.96 and 208.72

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Solution

The fourth proportional to 573.85, 860.96 and 208.72 is: 313.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.85 : 860.96 = 208.72 : x
  2. Step 2: Convert to fraction form
    573.85/860.96 = 208.72/x
  3. Step 3: Cross multiply
    573.85x = 860.96 × 208.72
  4. Step 4: Simplify right side
    573.85x = 179,699.57
  5. Step 5: Solve for x
    x = 179,699.57/573.85
  6. Step 6: Final answer
    x = 313.15

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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.