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Finding the Fourth Proportional to 395,719.02, 593,661.60 and 129,458.70

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Solution

The fourth proportional to 395,719.02, 593,661.60 and 129,458.70 is: 194,215.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,719.02 : 593,661.60 = 129,458.70 : x
  2. Step 2: Convert to fraction form
    395,719.02/593,661.60 = 129,458.70/x
  3. Step 3: Cross multiply
    395,719.02x = 593,661.60 × 129,458.70
  4. Step 4: Simplify right side
    395,719.02x = 76,854,658,975.92
  5. Step 5: Solve for x
    x = 76,854,658,975.92/395,719.02
  6. Step 6: Final answer
    x = 194,215.23

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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.