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Finding the Fourth Proportional to 573.40, 860.11 and 140.56

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Solution

The fourth proportional to 573.40, 860.11 and 140.56 is: 210.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.40 : 860.11 = 140.56 : x
  2. Step 2: Convert to fraction form
    573.40/860.11 = 140.56/x
  3. Step 3: Cross multiply
    573.40x = 860.11 × 140.56
  4. Step 4: Simplify right side
    573.40x = 120,894.56
  5. Step 5: Solve for x
    x = 120,894.56/573.40
  6. Step 6: Final answer
    x = 210.84

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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.