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Finding the Fourth Proportional to 6,191,728.40, 9,279,719.40 and 2,989,960.40

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Solution

The fourth proportional to 6,191,728.40, 9,279,719.40 and 2,989,960.40 is: 4,481,138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,191,728.40 : 9,279,719.40 = 2,989,960.40 : x
  2. Step 2: Convert to fraction form
    6,191,728.40/9,279,719.40 = 2,989,960.40/x
  3. Step 3: Cross multiply
    6,191,728.40x = 9,279,719.40 × 2,989,960.40
  4. Step 4: Simplify right side
    6,191,728.40x = 27,745,993,529,111.76
  5. Step 5: Solve for x
    x = 27,745,993,529,111.76/6,191,728.40
  6. Step 6: Final answer
    x = 4,481,138.66

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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.