Home / 509,919,368.40-764,879,052.60-203,431,438.80

Finding the Fourth Proportional to 509,919,368.40, 764,879,052.60 and 203,431,438.80

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Solution

The fourth proportional to 509,919,368.40, 764,879,052.60 and 203,431,438.80 is: 305,147,158.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,919,368.40 : 764,879,052.60 = 203,431,438.80 : x
  2. Step 2: Convert to fraction form
    509,919,368.40/764,879,052.60 = 203,431,438.80/x
  3. Step 3: Cross multiply
    509,919,368.40x = 764,879,052.60 × 203,431,438.80
  4. Step 4: Simplify right side
    509,919,368.40x = 155,600,446,178,398,880
  5. Step 5: Solve for x
    x = 155,600,446,178,398,880/509,919,368.40
  6. Step 6: Final answer
    x = 305,147,158.20

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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.