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Finding the Fourth Proportional to 390,201.87, 585,358.51 and 120,352.73

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Solution

The fourth proportional to 390,201.87, 585,358.51 and 120,352.73 is: 180,546.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,201.87 : 585,358.51 = 120,352.73 : x
  2. Step 2: Convert to fraction form
    390,201.87/585,358.51 = 120,352.73/x
  3. Step 3: Cross multiply
    390,201.87x = 585,358.51 × 120,352.73
  4. Step 4: Simplify right side
    390,201.87x = 70,449,491,479.56
  5. Step 5: Solve for x
    x = 70,449,491,479.56/390,201.87
  6. Step 6: Final answer
    x = 180,546.27

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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.