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Finding the Fourth Proportional to 395,933.70, 593,900.55 and 390,028.80

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Solution

The fourth proportional to 395,933.70, 593,900.55 and 390,028.80 is: 585,043.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,933.70 : 593,900.55 = 390,028.80 : x
  2. Step 2: Convert to fraction form
    395,933.70/593,900.55 = 390,028.80/x
  3. Step 3: Cross multiply
    395,933.70x = 593,900.55 × 390,028.80
  4. Step 4: Simplify right side
    395,933.70x = 231,638,318,835.84
  5. Step 5: Solve for x
    x = 231,638,318,835.84/395,933.70
  6. Step 6: Final answer
    x = 585,043.20

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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.