Home / 1,318.03-1,815.69-1,128.36

Finding the Fourth Proportional to 1,318.03, 1,815.69 and 1,128.36

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Solution

The fourth proportional to 1,318.03, 1,815.69 and 1,128.36 is: 1,554.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.03 : 1,815.69 = 1,128.36 : x
  2. Step 2: Convert to fraction form
    1,318.03/1,815.69 = 1,128.36/x
  3. Step 3: Cross multiply
    1,318.03x = 1,815.69 × 1,128.36
  4. Step 4: Simplify right side
    1,318.03x = 2,048,763.01
  5. Step 5: Solve for x
    x = 2,048,763.01/1,318.03
  6. Step 6: Final answer
    x = 1,554.42

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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.