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Finding the Fourth Proportional to 899.53, 1,349.31 and 855.34

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Solution

The fourth proportional to 899.53, 1,349.31 and 855.34 is: 1,283.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.53 : 1,349.31 = 855.34 : x
  2. Step 2: Convert to fraction form
    899.53/1,349.31 = 855.34/x
  3. Step 3: Cross multiply
    899.53x = 1,349.31 × 855.34
  4. Step 4: Simplify right side
    899.53x = 1,154,118.82
  5. Step 5: Solve for x
    x = 1,154,118.82/899.53
  6. Step 6: Final answer
    x = 1,283.02

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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.