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Finding the Fourth Proportional to 899.37, 1,241.64 and 805.95

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Solution

The fourth proportional to 899.37, 1,241.64 and 805.95 is: 1,112.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.37 : 1,241.64 = 805.95 : x
  2. Step 2: Convert to fraction form
    899.37/1,241.64 = 805.95/x
  3. Step 3: Cross multiply
    899.37x = 1,241.64 × 805.95
  4. Step 4: Simplify right side
    899.37x = 1,000,699.76
  5. Step 5: Solve for x
    x = 1,000,699.76/899.37
  6. Step 6: Final answer
    x = 1,112.67

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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.