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Finding the Fourth Proportional to 259,743.80, 389,615.70 and 253,911.80

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Solution

The fourth proportional to 259,743.80, 389,615.70 and 253,911.80 is: 380,867.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,743.80 : 389,615.70 = 253,911.80 : x
  2. Step 2: Convert to fraction form
    259,743.80/389,615.70 = 253,911.80/x
  3. Step 3: Cross multiply
    259,743.80x = 389,615.70 × 253,911.80
  4. Step 4: Simplify right side
    259,743.80x = 98,928,023,695.26
  5. Step 5: Solve for x
    x = 98,928,023,695.26/259,743.80
  6. Step 6: Final answer
    x = 380,867.70

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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.