Home / 2,718.88-4,078.32-1,420.05

Finding the Fourth Proportional to 2,718.88, 4,078.32 and 1,420.05

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Solution

The fourth proportional to 2,718.88, 4,078.32 and 1,420.05 is: 2,130.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.88 : 4,078.32 = 1,420.05 : x
  2. Step 2: Convert to fraction form
    2,718.88/4,078.32 = 1,420.05/x
  3. Step 3: Cross multiply
    2,718.88x = 4,078.32 × 1,420.05
  4. Step 4: Simplify right side
    2,718.88x = 5,791,418.32
  5. Step 5: Solve for x
    x = 5,791,418.32/2,718.88
  6. Step 6: Final answer
    x = 2,130.08

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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.