Home / 1,820.63-2,511.78-1,261.56

Finding the Fourth Proportional to 1,820.63, 2,511.78 and 1,261.56

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Solution

The fourth proportional to 1,820.63, 2,511.78 and 1,261.56 is: 1,740.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.63 : 2,511.78 = 1,261.56 : x
  2. Step 2: Convert to fraction form
    1,820.63/2,511.78 = 1,261.56/x
  3. Step 3: Cross multiply
    1,820.63x = 2,511.78 × 1,261.56
  4. Step 4: Simplify right side
    1,820.63x = 3,168,751.74
  5. Step 5: Solve for x
    x = 3,168,751.74/1,820.63
  6. Step 6: Final answer
    x = 1,740.47

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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.