Home / 1,579.11-2,178.19-1,018.68

Finding the Fourth Proportional to 1,579.11, 2,178.19 and 1,018.68

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Solution

The fourth proportional to 1,579.11, 2,178.19 and 1,018.68 is: 1,405.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.11 : 2,178.19 = 1,018.68 : x
  2. Step 2: Convert to fraction form
    1,579.11/2,178.19 = 1,018.68/x
  3. Step 3: Cross multiply
    1,579.11x = 2,178.19 × 1,018.68
  4. Step 4: Simplify right side
    1,579.11x = 2,218,878.59
  5. Step 5: Solve for x
    x = 2,218,878.59/1,579.11
  6. Step 6: Final answer
    x = 1,405.15

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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.