Home / 1,820.79-2,511.27-1,190.70

Finding the Fourth Proportional to 1,820.79, 2,511.27 and 1,190.70

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Solution

The fourth proportional to 1,820.79, 2,511.27 and 1,190.70 is: 1,642.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.79 : 2,511.27 = 1,190.70 : x
  2. Step 2: Convert to fraction form
    1,820.79/2,511.27 = 1,190.70/x
  3. Step 3: Cross multiply
    1,820.79x = 2,511.27 × 1,190.70
  4. Step 4: Simplify right side
    1,820.79x = 2,990,169.19
  5. Step 5: Solve for x
    x = 2,990,169.19/1,820.79
  6. Step 6: Final answer
    x = 1,642.24

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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.