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Finding the Fourth Proportional to 7,322.78, 10,980.30 and 2,391.80

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Solution

The fourth proportional to 7,322.78, 10,980.30 and 2,391.80 is: 3,586.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,322.78 : 10,980.30 = 2,391.80 : x
  2. Step 2: Convert to fraction form
    7,322.78/10,980.30 = 2,391.80/x
  3. Step 3: Cross multiply
    7,322.78x = 10,980.30 × 2,391.80
  4. Step 4: Simplify right side
    7,322.78x = 26,262,681.54
  5. Step 5: Solve for x
    x = 26,262,681.54/7,322.78
  6. Step 6: Final answer
    x = 3,586.44

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1.5x scale

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.