Home / 720,028,317-993,639,111.48-390,003,456

Finding the Fourth Proportional to 720,028,317, 993,639,111.48 and 390,003,456

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Solution

The fourth proportional to 720,028,317, 993,639,111.48 and 390,003,456 is: 538,204,787.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,028,317 : 993,639,111.48 = 390,003,456 : x
  2. Step 2: Convert to fraction form
    720,028,317/993,639,111.48 = 390,003,456/x
  3. Step 3: Cross multiply
    720,028,317x = 993,639,111.48 × 390,003,456
  4. Step 4: Simplify right side
    720,028,317x = 387,522,687,493,969,280
  5. Step 5: Solve for x
    x = 387,522,687,493,969,280/720,028,317
  6. Step 6: Final answer
    x = 538,204,787.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.