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Finding the Fourth Proportional to 982.21, 1,473 and 917.50

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Solution

The fourth proportional to 982.21, 1,473 and 917.50 is: 1,375.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.21 : 1,473 = 917.50 : x
  2. Step 2: Convert to fraction form
    982.21/1,473 = 917.50/x
  3. Step 3: Cross multiply
    982.21x = 1,473 × 917.50
  4. Step 4: Simplify right side
    982.21x = 1,351,477.50
  5. Step 5: Solve for x
    x = 1,351,477.50/982.21
  6. Step 6: Final answer
    x = 1,375.96

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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.