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Finding the Fourth Proportional to 991.05, 1,368.57 and 795.99

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Solution

The fourth proportional to 991.05, 1,368.57 and 795.99 is: 1,099.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    991.05 : 1,368.57 = 795.99 : x
  2. Step 2: Convert to fraction form
    991.05/1,368.57 = 795.99/x
  3. Step 3: Cross multiply
    991.05x = 1,368.57 × 795.99
  4. Step 4: Simplify right side
    991.05x = 1,089,368.03
  5. Step 5: Solve for x
    x = 1,089,368.03/991.05
  6. Step 6: Final answer
    x = 1,099.21

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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.