Home / 990,825,840.60-1,486,238,760.90-408,260,216.40

Finding the Fourth Proportional to 990,825,840.60, 1,486,238,760.90 and 408,260,216.40

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Solution

The fourth proportional to 990,825,840.60, 1,486,238,760.90 and 408,260,216.40 is: 612,390,324.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,825,840.60 : 1,486,238,760.90 = 408,260,216.40 : x
  2. Step 2: Convert to fraction form
    990,825,840.60/1,486,238,760.90 = 408,260,216.40/x
  3. Step 3: Cross multiply
    990,825,840.60x = 1,486,238,760.90 × 408,260,216.40
  4. Step 4: Simplify right side
    990,825,840.60x = 606,772,158,147,101,824
  5. Step 5: Solve for x
    x = 606,772,158,147,101,824/990,825,840.60
  6. Step 6: Final answer
    x = 612,390,324.60

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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.