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Finding the Fourth Proportional to 509,327.20, 764,336.40 and 331,400.80

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Solution

The fourth proportional to 509,327.20, 764,336.40 and 331,400.80 is: 497,326.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,327.20 : 764,336.40 = 331,400.80 : x
  2. Step 2: Convert to fraction form
    509,327.20/764,336.40 = 331,400.80/x
  3. Step 3: Cross multiply
    509,327.20x = 764,336.40 × 331,400.80
  4. Step 4: Simplify right side
    509,327.20x = 253,301,694,429.12
  5. Step 5: Solve for x
    x = 253,301,694,429.12/509,327.20
  6. Step 6: Final answer
    x = 497,326.07

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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.