Home / 509,936,020.40-764,904,030.60-398,971,139.60

Finding the Fourth Proportional to 509,936,020.40, 764,904,030.60 and 398,971,139.60

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Solution

The fourth proportional to 509,936,020.40, 764,904,030.60 and 398,971,139.60 is: 598,456,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,936,020.40 : 764,904,030.60 = 398,971,139.60 : x
  2. Step 2: Convert to fraction form
    509,936,020.40/764,904,030.60 = 398,971,139.60/x
  3. Step 3: Cross multiply
    509,936,020.40x = 764,904,030.60 × 398,971,139.60
  4. Step 4: Simplify right side
    509,936,020.40x = 305,174,632,773,115,328
  5. Step 5: Solve for x
    x = 305,174,632,773,115,328/509,936,020.40
  6. Step 6: Final answer
    x = 598,456,709.40

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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.