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Finding the Fourth Proportional to 899.16, 1,347.90 and 808.44

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Solution

The fourth proportional to 899.16, 1,347.90 and 808.44 is: 1,211.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.16 : 1,347.90 = 808.44 : x
  2. Step 2: Convert to fraction form
    899.16/1,347.90 = 808.44/x
  3. Step 3: Cross multiply
    899.16x = 1,347.90 × 808.44
  4. Step 4: Simplify right side
    899.16x = 1,089,696.28
  5. Step 5: Solve for x
    x = 1,089,696.28/899.16
  6. Step 6: Final answer
    x = 1,211.90

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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.