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Finding the Fourth Proportional to 259,252.80, 388,879.20 and 72,264.30

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Solution

The fourth proportional to 259,252.80, 388,879.20 and 72,264.30 is: 108,396.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,252.80 : 388,879.20 = 72,264.30 : x
  2. Step 2: Convert to fraction form
    259,252.80/388,879.20 = 72,264.30/x
  3. Step 3: Cross multiply
    259,252.80x = 388,879.20 × 72,264.30
  4. Step 4: Simplify right side
    259,252.80x = 28,102,083,172.56
  5. Step 5: Solve for x
    x = 28,102,083,172.56/259,252.80
  6. Step 6: Final answer
    x = 108,396.45

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1.5x scale

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.