Home / 2,078.40-3,118.08-617.68

Finding the Fourth Proportional to 2,078.40, 3,118.08 and 617.68

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Solution

The fourth proportional to 2,078.40, 3,118.08 and 617.68 is: 926.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.40 : 3,118.08 = 617.68 : x
  2. Step 2: Convert to fraction form
    2,078.40/3,118.08 = 617.68/x
  3. Step 3: Cross multiply
    2,078.40x = 3,118.08 × 617.68
  4. Step 4: Simplify right side
    2,078.40x = 1,925,975.65
  5. Step 5: Solve for x
    x = 1,925,975.65/2,078.40
  6. Step 6: Final answer
    x = 926.66

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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.