Home / 990,825,830.60-1,486,238,745.90-408,260,206.40

Finding the Fourth Proportional to 990,825,830.60, 1,486,238,745.90 and 408,260,206.40

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Solution

The fourth proportional to 990,825,830.60, 1,486,238,745.90 and 408,260,206.40 is: 612,390,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,825,830.60 : 1,486,238,745.90 = 408,260,206.40 : x
  2. Step 2: Convert to fraction form
    990,825,830.60/1,486,238,745.90 = 408,260,206.40/x
  3. Step 3: Cross multiply
    990,825,830.60x = 1,486,238,745.90 × 408,260,206.40
  4. Step 4: Simplify right side
    990,825,830.60x = 606,772,137,160,811,136
  5. Step 5: Solve for x
    x = 606,772,137,160,811,136/990,825,830.60
  6. Step 6: Final answer
    x = 612,390,309.60

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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.