Home / 1,511.88-2,085.66-890.52

Finding the Fourth Proportional to 1,511.88, 2,085.66 and 890.52

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Solution

The fourth proportional to 1,511.88, 2,085.66 and 890.52 is: 1,228.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.88 : 2,085.66 = 890.52 : x
  2. Step 2: Convert to fraction form
    1,511.88/2,085.66 = 890.52/x
  3. Step 3: Cross multiply
    1,511.88x = 2,085.66 × 890.52
  4. Step 4: Simplify right side
    1,511.88x = 1,857,321.94
  5. Step 5: Solve for x
    x = 1,857,321.94/1,511.88
  6. Step 6: Final answer
    x = 1,228.49

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1.5x scale

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.