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Finding the Fourth Proportional to 1,279,923.82, 1,920,935.13 and 649,018.06

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Solution

The fourth proportional to 1,279,923.82, 1,920,935.13 and 649,018.06 is: 974,059.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,923.82 : 1,920,935.13 = 649,018.06 : x
  2. Step 2: Convert to fraction form
    1,279,923.82/1,920,935.13 = 649,018.06/x
  3. Step 3: Cross multiply
    1,279,923.82x = 1,920,935.13 × 649,018.06
  4. Step 4: Simplify right side
    1,279,923.82x = 1,246,721,591,458.45
  5. Step 5: Solve for x
    x = 1,246,721,591,458.45/1,279,923.82
  6. Step 6: Final answer
    x = 974,059.22

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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.