Home / 509,984,690.40-764,977,035.60-399,019,809.60

Finding the Fourth Proportional to 509,984,690.40, 764,977,035.60 and 399,019,809.60

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Solution

The fourth proportional to 509,984,690.40, 764,977,035.60 and 399,019,809.60 is: 598,529,714.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,984,690.40 : 764,977,035.60 = 399,019,809.60 : x
  2. Step 2: Convert to fraction form
    509,984,690.40/764,977,035.60 = 399,019,809.60/x
  3. Step 3: Cross multiply
    509,984,690.40x = 764,977,035.60 × 399,019,809.60
  4. Step 4: Simplify right side
    509,984,690.40x = 305,240,991,093,484,480
  5. Step 5: Solve for x
    x = 305,240,991,093,484,480/509,984,690.40
  6. Step 6: Final answer
    x = 598,529,714.40

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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.