Home / 1,279.94-1,919.43-457.99

Finding the Fourth Proportional to 1,279.94, 1,919.43 and 457.99

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Solution

The fourth proportional to 1,279.94, 1,919.43 and 457.99 is: 686.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.94 : 1,919.43 = 457.99 : x
  2. Step 2: Convert to fraction form
    1,279.94/1,919.43 = 457.99/x
  3. Step 3: Cross multiply
    1,279.94x = 1,919.43 × 457.99
  4. Step 4: Simplify right side
    1,279.94x = 879,074.95
  5. Step 5: Solve for x
    x = 879,074.95/1,279.94
  6. Step 6: Final answer
    x = 686.81

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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.