Home / 2,118.99-2,924.81-1,279.55

Finding the Fourth Proportional to 2,118.99, 2,924.81 and 1,279.55

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Solution

The fourth proportional to 2,118.99, 2,924.81 and 1,279.55 is: 1,766.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.99 : 2,924.81 = 1,279.55 : x
  2. Step 2: Convert to fraction form
    2,118.99/2,924.81 = 1,279.55/x
  3. Step 3: Cross multiply
    2,118.99x = 2,924.81 × 1,279.55
  4. Step 4: Simplify right side
    2,118.99x = 3,742,429.90
  5. Step 5: Solve for x
    x = 3,742,429.90/2,118.99
  6. Step 6: Final answer
    x = 1,766.14

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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.