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Finding the Fourth Proportional to 259,615.80, 389,423.70 and 119,647.80

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Solution

The fourth proportional to 259,615.80, 389,423.70 and 119,647.80 is: 179,471.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,615.80 : 389,423.70 = 119,647.80 : x
  2. Step 2: Convert to fraction form
    259,615.80/389,423.70 = 119,647.80/x
  3. Step 3: Cross multiply
    259,615.80x = 389,423.70 × 119,647.80
  4. Step 4: Simplify right side
    259,615.80x = 46,593,688,972.86
  5. Step 5: Solve for x
    x = 46,593,688,972.86/259,615.80
  6. Step 6: Final answer
    x = 179,471.70

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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.