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Finding the Fourth Proportional to 391,725.60, 587,242.80 and 233,786.40

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Solution

The fourth proportional to 391,725.60, 587,242.80 and 233,786.40 is: 350,473.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,725.60 : 587,242.80 = 233,786.40 : x
  2. Step 2: Convert to fraction form
    391,725.60/587,242.80 = 233,786.40/x
  3. Step 3: Cross multiply
    391,725.60x = 587,242.80 × 233,786.40
  4. Step 4: Simplify right side
    391,725.60x = 137,289,380,137.92
  5. Step 5: Solve for x
    x = 137,289,380,137.92/391,725.60
  6. Step 6: Final answer
    x = 350,473.34

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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.