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Finding the Fourth Proportional to 259,271.80, 388,907.70 and 72,283.30

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Solution

The fourth proportional to 259,271.80, 388,907.70 and 72,283.30 is: 108,424.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,271.80 : 388,907.70 = 72,283.30 : x
  2. Step 2: Convert to fraction form
    259,271.80/388,907.70 = 72,283.30/x
  3. Step 3: Cross multiply
    259,271.80x = 388,907.70 × 72,283.30
  4. Step 4: Simplify right side
    259,271.80x = 28,111,531,951.41
  5. Step 5: Solve for x
    x = 28,111,531,951.41/259,271.80
  6. Step 6: Final answer
    x = 108,424.95

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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.