Home / 1,511.44-2,085.36-921.92

Finding the Fourth Proportional to 1,511.44, 2,085.36 and 921.92

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Solution

The fourth proportional to 1,511.44, 2,085.36 and 921.92 is: 1,271.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.44 : 2,085.36 = 921.92 : x
  2. Step 2: Convert to fraction form
    1,511.44/2,085.36 = 921.92/x
  3. Step 3: Cross multiply
    1,511.44x = 2,085.36 × 921.92
  4. Step 4: Simplify right side
    1,511.44x = 1,922,535.09
  5. Step 5: Solve for x
    x = 1,922,535.09/1,511.44
  6. Step 6: Final answer
    x = 1,271.99

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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.