Home / 2,918.76-4,378.86-1,187.88

Finding the Fourth Proportional to 2,918.76, 4,378.86 and 1,187.88

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Solution

The fourth proportional to 2,918.76, 4,378.86 and 1,187.88 is: 1,782.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.76 : 4,378.86 = 1,187.88 : x
  2. Step 2: Convert to fraction form
    2,918.76/4,378.86 = 1,187.88/x
  3. Step 3: Cross multiply
    2,918.76x = 4,378.86 × 1,187.88
  4. Step 4: Simplify right side
    2,918.76x = 5,201,560.22
  5. Step 5: Solve for x
    x = 5,201,560.22/2,918.76
  6. Step 6: Final answer
    x = 1,782.11

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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.