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Finding the Fourth Proportional to 259,743.40, 389,615.10 and 189,759.40

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Solution

The fourth proportional to 259,743.40, 389,615.10 and 189,759.40 is: 284,639.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,743.40 : 389,615.10 = 189,759.40 : x
  2. Step 2: Convert to fraction form
    259,743.40/389,615.10 = 189,759.40/x
  3. Step 3: Cross multiply
    259,743.40x = 389,615.10 × 189,759.40
  4. Step 4: Simplify right side
    259,743.40x = 73,933,127,606.94
  5. Step 5: Solve for x
    x = 73,933,127,606.94/259,743.40
  6. Step 6: Final answer
    x = 284,639.10

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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.