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Finding the Fourth Proportional to 339,067.80, 508,601.70 and 279,970.20

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Solution

The fourth proportional to 339,067.80, 508,601.70 and 279,970.20 is: 419,955.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,067.80 : 508,601.70 = 279,970.20 : x
  2. Step 2: Convert to fraction form
    339,067.80/508,601.70 = 279,970.20/x
  3. Step 3: Cross multiply
    339,067.80x = 508,601.70 × 279,970.20
  4. Step 4: Simplify right side
    339,067.80x = 142,393,319,669.34
  5. Step 5: Solve for x
    x = 142,393,319,669.34/339,067.80
  6. Step 6: Final answer
    x = 419,955.30

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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.