Home / 2,918.12-4,378.94-1,186.70

Finding the Fourth Proportional to 2,918.12, 4,378.94 and 1,186.70

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Solution

The fourth proportional to 2,918.12, 4,378.94 and 1,186.70 is: 1,780.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.12 : 4,378.94 = 1,186.70 : x
  2. Step 2: Convert to fraction form
    2,918.12/4,378.94 = 1,186.70/x
  3. Step 3: Cross multiply
    2,918.12x = 4,378.94 × 1,186.70
  4. Step 4: Simplify right side
    2,918.12x = 5,196,469.17
  5. Step 5: Solve for x
    x = 5,196,469.17/2,918.12
  6. Step 6: Final answer
    x = 1,780.76

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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.