Home / 1,535.08-2,118.73-905.37

Finding the Fourth Proportional to 1,535.08, 2,118.73 and 905.37

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Solution

The fourth proportional to 1,535.08, 2,118.73 and 905.37 is: 1,249.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.08 : 2,118.73 = 905.37 : x
  2. Step 2: Convert to fraction form
    1,535.08/2,118.73 = 905.37/x
  3. Step 3: Cross multiply
    1,535.08x = 2,118.73 × 905.37
  4. Step 4: Simplify right side
    1,535.08x = 1,918,234.57
  5. Step 5: Solve for x
    x = 1,918,234.57/1,535.08
  6. Step 6: Final answer
    x = 1,249.60

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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.