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Finding the Fourth Proportional to 259,636.80, 389,455.20 and 141,247.20

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Solution

The fourth proportional to 259,636.80, 389,455.20 and 141,247.20 is: 211,870.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,636.80 : 389,455.20 = 141,247.20 : x
  2. Step 2: Convert to fraction form
    259,636.80/389,455.20 = 141,247.20/x
  3. Step 3: Cross multiply
    259,636.80x = 389,455.20 × 141,247.20
  4. Step 4: Simplify right side
    259,636.80x = 55,009,456,525.44
  5. Step 5: Solve for x
    x = 55,009,456,525.44/259,636.80
  6. Step 6: Final answer
    x = 211,870.80

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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.