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Finding the Fourth Proportional to 883.50, 1,215.63 and 810.60

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Solution

The fourth proportional to 883.50, 1,215.63 and 810.60 is: 1,115.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.50 : 1,215.63 = 810.60 : x
  2. Step 2: Convert to fraction form
    883.50/1,215.63 = 810.60/x
  3. Step 3: Cross multiply
    883.50x = 1,215.63 × 810.60
  4. Step 4: Simplify right side
    883.50x = 985,389.68
  5. Step 5: Solve for x
    x = 985,389.68/883.50
  6. Step 6: Final answer
    x = 1,115.33

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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.