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Finding the Fourth Proportional to 309,118.44, 428,765.80 and 300,924.48

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Solution

The fourth proportional to 309,118.44, 428,765.80 and 300,924.48 is: 417,400.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,118.44 : 428,765.80 = 300,924.48 : x
  2. Step 2: Convert to fraction form
    309,118.44/428,765.80 = 300,924.48/x
  3. Step 3: Cross multiply
    309,118.44x = 428,765.80 × 300,924.48
  4. Step 4: Simplify right side
    309,118.44x = 129,026,125,406.78
  5. Step 5: Solve for x
    x = 129,026,125,406.78/309,118.44
  6. Step 6: Final answer
    x = 417,400.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.