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Finding the Fourth Proportional to 399,211.70, 550,865.49 and 238,075.70

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Solution

The fourth proportional to 399,211.70, 550,865.49 and 238,075.70 is: 328,516.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,211.70 : 550,865.49 = 238,075.70 : x
  2. Step 2: Convert to fraction form
    399,211.70/550,865.49 = 238,075.70/x
  3. Step 3: Cross multiply
    399,211.70x = 550,865.49 × 238,075.70
  4. Step 4: Simplify right side
    399,211.70x = 131,147,687,137.59
  5. Step 5: Solve for x
    x = 131,147,687,137.59/399,211.70
  6. Step 6: Final answer
    x = 328,516.64

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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.