Home / 3,078.84-4,615.50-1,129.68

Finding the Fourth Proportional to 3,078.84, 4,615.50 and 1,129.68

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Solution

The fourth proportional to 3,078.84, 4,615.50 and 1,129.68 is: 1,693.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.84 : 4,615.50 = 1,129.68 : x
  2. Step 2: Convert to fraction form
    3,078.84/4,615.50 = 1,129.68/x
  3. Step 3: Cross multiply
    3,078.84x = 4,615.50 × 1,129.68
  4. Step 4: Simplify right side
    3,078.84x = 5,214,038.04
  5. Step 5: Solve for x
    x = 5,214,038.04/3,078.84
  6. Step 6: Final answer
    x = 1,693.51

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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.