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Finding the Fourth Proportional to 488,793,940.40, 734,041,216.20 and 259,211,428.40

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Solution

The fourth proportional to 488,793,940.40, 734,041,216.20 and 259,211,428.40 is: 389,268,066.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,793,940.40 : 734,041,216.20 = 259,211,428.40 : x
  2. Step 2: Convert to fraction form
    488,793,940.40/734,041,216.20 = 259,211,428.40/x
  3. Step 3: Cross multiply
    488,793,940.40x = 734,041,216.20 × 259,211,428.40
  4. Step 4: Simplify right side
    488,793,940.40x = 190,271,872,155,675,232
  5. Step 5: Solve for x
    x = 190,271,872,155,675,232/488,793,940.40
  6. Step 6: Final answer
    x = 389,268,066.62

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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.