Home / 1,279.30-1,918.95-1,230.70

Finding the Fourth Proportional to 1,279.30, 1,918.95 and 1,230.70

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Solution

The fourth proportional to 1,279.30, 1,918.95 and 1,230.70 is: 1,846.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.30 : 1,918.95 = 1,230.70 : x
  2. Step 2: Convert to fraction form
    1,279.30/1,918.95 = 1,230.70/x
  3. Step 3: Cross multiply
    1,279.30x = 1,918.95 × 1,230.70
  4. Step 4: Simplify right side
    1,279.30x = 2,361,651.77
  5. Step 5: Solve for x
    x = 2,361,651.77/1,279.30
  6. Step 6: Final answer
    x = 1,846.05

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1.5x scale

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.