Home / 831,130,205.60-1,245,872,996.40-393,661,971.20

Finding the Fourth Proportional to 831,130,205.60, 1,245,872,996.40 and 393,661,971.20

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Solution

The fourth proportional to 831,130,205.60, 1,245,872,996.40 and 393,661,971.20 is: 590,103,471.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,130,205.60 : 1,245,872,996.40 = 393,661,971.20 : x
  2. Step 2: Convert to fraction form
    831,130,205.60/1,245,872,996.40 = 393,661,971.20/x
  3. Step 3: Cross multiply
    831,130,205.60x = 1,245,872,996.40 × 393,661,971.20
  4. Step 4: Simplify right side
    831,130,205.60x = 490,452,819,627,674,496
  5. Step 5: Solve for x
    x = 490,452,819,627,674,496/831,130,205.60
  6. Step 6: Final answer
    x = 590,103,471.54

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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.