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Finding the Fourth Proportional to 509,670.60, 764,505.90 and 485,176.20

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Solution

The fourth proportional to 509,670.60, 764,505.90 and 485,176.20 is: 727,764.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,670.60 : 764,505.90 = 485,176.20 : x
  2. Step 2: Convert to fraction form
    509,670.60/764,505.90 = 485,176.20/x
  3. Step 3: Cross multiply
    509,670.60x = 764,505.90 × 485,176.20
  4. Step 4: Simplify right side
    509,670.60x = 370,920,067,439.58
  5. Step 5: Solve for x
    x = 370,920,067,439.58/509,670.60
  6. Step 6: Final answer
    x = 727,764.30

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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.