Home / 1,820.36-2,511.20-1,190.64

Finding the Fourth Proportional to 1,820.36, 2,511.20 and 1,190.64

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Solution

The fourth proportional to 1,820.36, 2,511.20 and 1,190.64 is: 1,642.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.36 : 2,511.20 = 1,190.64 : x
  2. Step 2: Convert to fraction form
    1,820.36/2,511.20 = 1,190.64/x
  3. Step 3: Cross multiply
    1,820.36x = 2,511.20 × 1,190.64
  4. Step 4: Simplify right side
    1,820.36x = 2,989,935.17
  5. Step 5: Solve for x
    x = 2,989,935.17/1,820.36
  6. Step 6: Final answer
    x = 1,642.50

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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.