Home / 5,280-7,286.40-2,922.50

Finding the Fourth Proportional to 5,280, 7,286.40 and 2,922.50

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Solution

The fourth proportional to 5,280, 7,286.40 and 2,922.50 is: 4,033.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280 : 7,286.40 = 2,922.50 : x
  2. Step 2: Convert to fraction form
    5,280/7,286.40 = 2,922.50/x
  3. Step 3: Cross multiply
    5,280x = 7,286.40 × 2,922.50
  4. Step 4: Simplify right side
    5,280x = 21,294,467.57
  5. Step 5: Solve for x
    x = 21,294,467.57/5,280
  6. Step 6: Final answer
    x = 4,033.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.