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Finding the Fourth Proportional to 352,120.40, 528,958.20 and 338,901.20

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Solution

The fourth proportional to 352,120.40, 528,958.20 and 338,901.20 is: 509,100.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,120.40 : 528,958.20 = 338,901.20 : x
  2. Step 2: Convert to fraction form
    352,120.40/528,958.20 = 338,901.20/x
  3. Step 3: Cross multiply
    352,120.40x = 528,958.20 × 338,901.20
  4. Step 4: Simplify right side
    352,120.40x = 179,264,568,729.84
  5. Step 5: Solve for x
    x = 179,264,568,729.84/352,120.40
  6. Step 6: Final answer
    x = 509,100.21

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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.