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Finding the Fourth Proportional to 899.78, 1,348.16 and 866.07

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Solution

The fourth proportional to 899.78, 1,348.16 and 866.07 is: 1,297.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.78 : 1,348.16 = 866.07 : x
  2. Step 2: Convert to fraction form
    899.78/1,348.16 = 866.07/x
  3. Step 3: Cross multiply
    899.78x = 1,348.16 × 866.07
  4. Step 4: Simplify right side
    899.78x = 1,167,596.60
  5. Step 5: Solve for x
    x = 1,167,596.60/899.78
  6. Step 6: Final answer
    x = 1,297.65

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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.