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Finding the Fourth Proportional to 399,309.98, 550,982.78 and 235,943.77

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Solution

The fourth proportional to 399,309.98, 550,982.78 and 235,943.77 is: 325,564.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,309.98 : 550,982.78 = 235,943.77 : x
  2. Step 2: Convert to fraction form
    399,309.98/550,982.78 = 235,943.77/x
  3. Step 3: Cross multiply
    399,309.98x = 550,982.78 × 235,943.77
  4. Step 4: Simplify right side
    399,309.98x = 130,000,954,318.28
  5. Step 5: Solve for x
    x = 130,000,954,318.28/399,309.98
  6. Step 6: Final answer
    x = 325,564.00

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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.