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Finding the Fourth Proportional to 395,999.40, 594,144.90 and 129,768.60

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Solution

The fourth proportional to 395,999.40, 594,144.90 and 129,768.60 is: 194,700.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,999.40 : 594,144.90 = 129,768.60 : x
  2. Step 2: Convert to fraction form
    395,999.40/594,144.90 = 129,768.60/x
  3. Step 3: Cross multiply
    395,999.40x = 594,144.90 × 129,768.60
  4. Step 4: Simplify right side
    395,999.40x = 77,101,351,870.14
  5. Step 5: Solve for x
    x = 77,101,351,870.14/395,999.40
  6. Step 6: Final answer
    x = 194,700.68

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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.