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Finding the Fourth Proportional to 695,524.80, 1,043,978.40 and 340,939.20

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Solution

The fourth proportional to 695,524.80, 1,043,978.40 and 340,939.20 is: 511,747.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,524.80 : 1,043,978.40 = 340,939.20 : x
  2. Step 2: Convert to fraction form
    695,524.80/1,043,978.40 = 340,939.20/x
  3. Step 3: Cross multiply
    695,524.80x = 1,043,978.40 × 340,939.20
  4. Step 4: Simplify right side
    695,524.80x = 355,933,160,513.28
  5. Step 5: Solve for x
    x = 355,933,160,513.28/695,524.80
  6. Step 6: Final answer
    x = 511,747.62

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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.