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Finding the Fourth Proportional to 353,221.60, 528,622.80 and 213,080.80

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Solution

The fourth proportional to 353,221.60, 528,622.80 and 213,080.80 is: 318,891.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,221.60 : 528,622.80 = 213,080.80 : x
  2. Step 2: Convert to fraction form
    353,221.60/528,622.80 = 213,080.80/x
  3. Step 3: Cross multiply
    353,221.60x = 528,622.80 × 213,080.80
  4. Step 4: Simplify right side
    353,221.60x = 112,639,369,122.24
  5. Step 5: Solve for x
    x = 112,639,369,122.24/353,221.60
  6. Step 6: Final answer
    x = 318,891.51

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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.