Home / 509,935,991.40-764,903,987.10-398,971,110.60

Finding the Fourth Proportional to 509,935,991.40, 764,903,987.10 and 398,971,110.60

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Solution

The fourth proportional to 509,935,991.40, 764,903,987.10 and 398,971,110.60 is: 598,456,665.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,935,991.40 : 764,903,987.10 = 398,971,110.60 : x
  2. Step 2: Convert to fraction form
    509,935,991.40/764,903,987.10 = 398,971,110.60/x
  3. Step 3: Cross multiply
    509,935,991.40x = 764,903,987.10 × 398,971,110.60
  4. Step 4: Simplify right side
    509,935,991.40x = 305,174,593,235,655,104
  5. Step 5: Solve for x
    x = 305,174,593,235,655,104/509,935,991.40
  6. Step 6: Final answer
    x = 598,456,665.90

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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.