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Finding the Fourth Proportional to 259,798.20, 389,697.30 and 207,310.20

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Solution

The fourth proportional to 259,798.20, 389,697.30 and 207,310.20 is: 310,965.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,798.20 : 389,697.30 = 207,310.20 : x
  2. Step 2: Convert to fraction form
    259,798.20/389,697.30 = 207,310.20/x
  3. Step 3: Cross multiply
    259,798.20x = 389,697.30 × 207,310.20
  4. Step 4: Simplify right side
    259,798.20x = 80,788,225,202.46
  5. Step 5: Solve for x
    x = 80,788,225,202.46/259,798.20
  6. Step 6: Final answer
    x = 310,965.30

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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.