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Finding the Fourth Proportional to 321,307.80, 481,961.70 and 309,060.60

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Solution

The fourth proportional to 321,307.80, 481,961.70 and 309,060.60 is: 463,590.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,307.80 : 481,961.70 = 309,060.60 : x
  2. Step 2: Convert to fraction form
    321,307.80/481,961.70 = 309,060.60/x
  3. Step 3: Cross multiply
    321,307.80x = 481,961.70 × 309,060.60
  4. Step 4: Simplify right side
    321,307.80x = 148,955,372,179.02
  5. Step 5: Solve for x
    x = 148,955,372,179.02/321,307.80
  6. Step 6: Final answer
    x = 463,590.90

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Similar ratio
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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.