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Finding the Fourth Proportional to 259,770.20, 389,655.30 and 207,282.20

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Solution

The fourth proportional to 259,770.20, 389,655.30 and 207,282.20 is: 310,923.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,770.20 : 389,655.30 = 207,282.20 : x
  2. Step 2: Convert to fraction form
    259,770.20/389,655.30 = 207,282.20/x
  3. Step 3: Cross multiply
    259,770.20x = 389,655.30 × 207,282.20
  4. Step 4: Simplify right side
    259,770.20x = 80,768,607,825.66
  5. Step 5: Solve for x
    x = 80,768,607,825.66/259,770.20
  6. Step 6: Final answer
    x = 310,923.30

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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.