Home / 1,451.58-2,003.75-979.75

Finding the Fourth Proportional to 1,451.58, 2,003.75 and 979.75

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Solution

The fourth proportional to 1,451.58, 2,003.75 and 979.75 is: 1,352.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.58 : 2,003.75 = 979.75 : x
  2. Step 2: Convert to fraction form
    1,451.58/2,003.75 = 979.75/x
  3. Step 3: Cross multiply
    1,451.58x = 2,003.75 × 979.75
  4. Step 4: Simplify right side
    1,451.58x = 1,963,174.06
  5. Step 5: Solve for x
    x = 1,963,174.06/1,451.58
  6. Step 6: Final answer
    x = 1,352.44

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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.