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Finding the Fourth Proportional to 259,756.70, 389,635.05 and 213,062.30

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Solution

The fourth proportional to 259,756.70, 389,635.05 and 213,062.30 is: 319,593.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,756.70 : 389,635.05 = 213,062.30 : x
  2. Step 2: Convert to fraction form
    259,756.70/389,635.05 = 213,062.30/x
  3. Step 3: Cross multiply
    259,756.70x = 389,635.05 × 213,062.30
  4. Step 4: Simplify right side
    259,756.70x = 83,016,539,913.62
  5. Step 5: Solve for x
    x = 83,016,539,913.62/259,756.70
  6. Step 6: Final answer
    x = 319,593.45

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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.