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Finding the Fourth Proportional to 7,292.40, 10,939.28 and 2,908.80

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Solution

The fourth proportional to 7,292.40, 10,939.28 and 2,908.80 is: 4,363.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,292.40 : 10,939.28 = 2,908.80 : x
  2. Step 2: Convert to fraction form
    7,292.40/10,939.28 = 2,908.80/x
  3. Step 3: Cross multiply
    7,292.40x = 10,939.28 × 2,908.80
  4. Step 4: Simplify right side
    7,292.40x = 31,820,177.66
  5. Step 5: Solve for x
    x = 31,820,177.66/7,292.40
  6. Step 6: Final answer
    x = 4,363.47

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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.