Home / 1,085.27-1,628.70-810.53

Finding the Fourth Proportional to 1,085.27, 1,628.70 and 810.53

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Solution

The fourth proportional to 1,085.27, 1,628.70 and 810.53 is: 1,216.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.27 : 1,628.70 = 810.53 : x
  2. Step 2: Convert to fraction form
    1,085.27/1,628.70 = 810.53/x
  3. Step 3: Cross multiply
    1,085.27x = 1,628.70 × 810.53
  4. Step 4: Simplify right side
    1,085.27x = 1,320,102.07
  5. Step 5: Solve for x
    x = 1,320,102.07/1,085.27
  6. Step 6: Final answer
    x = 1,216.39

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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.