Home / 990,825,828.10-1,486,238,742.15-408,260,203.90

Finding the Fourth Proportional to 990,825,828.10, 1,486,238,742.15 and 408,260,203.90

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Solution

The fourth proportional to 990,825,828.10, 1,486,238,742.15 and 408,260,203.90 is: 612,390,305.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,825,828.10 : 1,486,238,742.15 = 408,260,203.90 : x
  2. Step 2: Convert to fraction form
    990,825,828.10/1,486,238,742.15 = 408,260,203.90/x
  3. Step 3: Cross multiply
    990,825,828.10x = 1,486,238,742.15 × 408,260,203.90
  4. Step 4: Simplify right side
    990,825,828.10x = 606,772,131,914,238,464
  5. Step 5: Solve for x
    x = 606,772,131,914,238,464/990,825,828.10
  6. Step 6: Final answer
    x = 612,390,305.85

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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.