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Finding the Fourth Proportional to 259,958.80, 389,938.20 and 72,970.30

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Solution

The fourth proportional to 259,958.80, 389,938.20 and 72,970.30 is: 109,455.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,958.80 : 389,938.20 = 72,970.30 : x
  2. Step 2: Convert to fraction form
    259,958.80/389,938.20 = 72,970.30/x
  3. Step 3: Cross multiply
    259,958.80x = 389,938.20 × 72,970.30
  4. Step 4: Simplify right side
    259,958.80x = 28,453,907,435.46
  5. Step 5: Solve for x
    x = 28,453,907,435.46/259,958.80
  6. Step 6: Final answer
    x = 109,455.45

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Similar ratio
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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.