Home / 1,918.80-2,878.32-749.04

Finding the Fourth Proportional to 1,918.80, 2,878.32 and 749.04

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Solution

The fourth proportional to 1,918.80, 2,878.32 and 749.04 is: 1,123.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.80 : 2,878.32 = 749.04 : x
  2. Step 2: Convert to fraction form
    1,918.80/2,878.32 = 749.04/x
  3. Step 3: Cross multiply
    1,918.80x = 2,878.32 × 749.04
  4. Step 4: Simplify right side
    1,918.80x = 2,155,976.81
  5. Step 5: Solve for x
    x = 2,155,976.81/1,918.80
  6. Step 6: Final answer
    x = 1,123.61

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1.5x scale

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.