Home / 3,280.49-4,920.93-815.36

Finding the Fourth Proportional to 3,280.49, 4,920.93 and 815.36

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Solution

The fourth proportional to 3,280.49, 4,920.93 and 815.36 is: 1,223.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.49 : 4,920.93 = 815.36 : x
  2. Step 2: Convert to fraction form
    3,280.49/4,920.93 = 815.36/x
  3. Step 3: Cross multiply
    3,280.49x = 4,920.93 × 815.36
  4. Step 4: Simplify right side
    3,280.49x = 4,012,341.79
  5. Step 5: Solve for x
    x = 4,012,341.79/3,280.49
  6. Step 6: Final answer
    x = 1,223.09

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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.