Home / 1,579.12-2,178.86-1,019.46

Finding the Fourth Proportional to 1,579.12, 2,178.86 and 1,019.46

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Solution

The fourth proportional to 1,579.12, 2,178.86 and 1,019.46 is: 1,406.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.12 : 2,178.86 = 1,019.46 : x
  2. Step 2: Convert to fraction form
    1,579.12/2,178.86 = 1,019.46/x
  3. Step 3: Cross multiply
    1,579.12x = 2,178.86 × 1,019.46
  4. Step 4: Simplify right side
    1,579.12x = 2,221,260.62
  5. Step 5: Solve for x
    x = 2,221,260.62/1,579.12
  6. Step 6: Final answer
    x = 1,406.64

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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.