Home / 1,535.04-2,118.64-905.54

Finding the Fourth Proportional to 1,535.04, 2,118.64 and 905.54

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Solution

The fourth proportional to 1,535.04, 2,118.64 and 905.54 is: 1,249.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.04 : 2,118.64 = 905.54 : x
  2. Step 2: Convert to fraction form
    1,535.04/2,118.64 = 905.54/x
  3. Step 3: Cross multiply
    1,535.04x = 2,118.64 × 905.54
  4. Step 4: Simplify right side
    1,535.04x = 1,918,513.27
  5. Step 5: Solve for x
    x = 1,918,513.27/1,535.04
  6. Step 6: Final answer
    x = 1,249.81

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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.