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Finding the Fourth Proportional to 321,311.80, 443,403.46 and 178,070.59

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Solution

The fourth proportional to 321,311.80, 443,403.46 and 178,070.59 is: 245,733.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,311.80 : 443,403.46 = 178,070.59 : x
  2. Step 2: Convert to fraction form
    321,311.80/443,403.46 = 178,070.59/x
  3. Step 3: Cross multiply
    321,311.80x = 443,403.46 × 178,070.59
  4. Step 4: Simplify right side
    321,311.80x = 78,957,115,730.24
  5. Step 5: Solve for x
    x = 78,957,115,730.24/321,311.80
  6. Step 6: Final answer
    x = 245,733.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.