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Finding the Fourth Proportional to 352,525.60, 528,010.80 and 212,039.20

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Solution

The fourth proportional to 352,525.60, 528,010.80 and 212,039.20 is: 317,591.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,525.60 : 528,010.80 = 212,039.20 : x
  2. Step 2: Convert to fraction form
    352,525.60/528,010.80 = 212,039.20/x
  3. Step 3: Cross multiply
    352,525.60x = 528,010.80 × 212,039.20
  4. Step 4: Simplify right side
    352,525.60x = 111,958,987,623.36
  5. Step 5: Solve for x
    x = 111,958,987,623.36/352,525.60
  6. Step 6: Final answer
    x = 317,591.08

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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.