Home / 680.03-1,019.42-290.32

Finding the Fourth Proportional to 680.03, 1,019.42 and 290.32

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Solution

The fourth proportional to 680.03, 1,019.42 and 290.32 is: 435.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.03 : 1,019.42 = 290.32 : x
  2. Step 2: Convert to fraction form
    680.03/1,019.42 = 290.32/x
  3. Step 3: Cross multiply
    680.03x = 1,019.42 × 290.32
  4. Step 4: Simplify right side
    680.03x = 295,955.10
  5. Step 5: Solve for x
    x = 295,955.10/680.03
  6. Step 6: Final answer
    x = 435.21

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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.