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Finding the Fourth Proportional to 7,288.80, 10,058.40 and 3,976.80

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Solution

The fourth proportional to 7,288.80, 10,058.40 and 3,976.80 is: 5,487.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,288.80 : 10,058.40 = 3,976.80 : x
  2. Step 2: Convert to fraction form
    7,288.80/10,058.40 = 3,976.80/x
  3. Step 3: Cross multiply
    7,288.80x = 10,058.40 × 3,976.80
  4. Step 4: Simplify right side
    7,288.80x = 40,000,245.12
  5. Step 5: Solve for x
    x = 40,000,245.12/7,288.80
  6. Step 6: Final answer
    x = 5,487.91

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1.5x scale

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.