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Finding the Fourth Proportional to 850.41, 1,172.88 and 570.56

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Solution

The fourth proportional to 850.41, 1,172.88 and 570.56 is: 786.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.41 : 1,172.88 = 570.56 : x
  2. Step 2: Convert to fraction form
    850.41/1,172.88 = 570.56/x
  3. Step 3: Cross multiply
    850.41x = 1,172.88 × 570.56
  4. Step 4: Simplify right side
    850.41x = 669,192.55
  5. Step 5: Solve for x
    x = 669,192.55/850.41
  6. Step 6: Final answer
    x = 786.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.