Home / 1,078.45-1,616.28-485.04

Finding the Fourth Proportional to 1,078.45, 1,616.28 and 485.04

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Solution

The fourth proportional to 1,078.45, 1,616.28 and 485.04 is: 726.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.45 : 1,616.28 = 485.04 : x
  2. Step 2: Convert to fraction form
    1,078.45/1,616.28 = 485.04/x
  3. Step 3: Cross multiply
    1,078.45x = 1,616.28 × 485.04
  4. Step 4: Simplify right side
    1,078.45x = 783,960.45
  5. Step 5: Solve for x
    x = 783,960.45/1,078.45
  6. Step 6: Final answer
    x = 726.93

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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.