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Finding the Fourth Proportional to 398,883.96, 550,662.93 and 308,035.98

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Solution

The fourth proportional to 398,883.96, 550,662.93 and 308,035.98 is: 425,246.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,883.96 : 550,662.93 = 308,035.98 : x
  2. Step 2: Convert to fraction form
    398,883.96/550,662.93 = 308,035.98/x
  3. Step 3: Cross multiply
    398,883.96x = 550,662.93 × 308,035.98
  4. Step 4: Simplify right side
    398,883.96x = 169,623,995,292.22
  5. Step 5: Solve for x
    x = 169,623,995,292.22/398,883.96
  6. Step 6: Final answer
    x = 425,246.47

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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.