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Finding the Fourth Proportional to 439,725.60, 659,134.80 and 239,623.20

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Solution

The fourth proportional to 439,725.60, 659,134.80 and 239,623.20 is: 359,187.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,725.60 : 659,134.80 = 239,623.20 : x
  2. Step 2: Convert to fraction form
    439,725.60/659,134.80 = 239,623.20/x
  3. Step 3: Cross multiply
    439,725.60x = 659,134.80 × 239,623.20
  4. Step 4: Simplify right side
    439,725.60x = 157,943,990,007.36
  5. Step 5: Solve for x
    x = 157,943,990,007.36/439,725.60
  6. Step 6: Final answer
    x = 359,187.62

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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.