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Finding the Fourth Proportional to 259,855.60, 389,491.80 and 147,589.60

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Solution

The fourth proportional to 259,855.60, 389,491.80 and 147,589.60 is: 221,218.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,855.60 : 389,491.80 = 147,589.60 : x
  2. Step 2: Convert to fraction form
    259,855.60/389,491.80 = 147,589.60/x
  3. Step 3: Cross multiply
    259,855.60x = 389,491.80 × 147,589.60
  4. Step 4: Simplify right side
    259,855.60x = 57,484,938,965.28
  5. Step 5: Solve for x
    x = 57,484,938,965.28/259,855.60
  6. Step 6: Final answer
    x = 221,218.78

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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.