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Finding the Fourth Proportional to 908,335,650.75, 1,253,503,701.84 and 490,647,938.32

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Solution

The fourth proportional to 908,335,650.75, 1,253,503,701.84 and 490,647,938.32 is: 677,094,427.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,335,650.75 : 1,253,503,701.84 = 490,647,938.32 : x
  2. Step 2: Convert to fraction form
    908,335,650.75/1,253,503,701.84 = 490,647,938.32/x
  3. Step 3: Cross multiply
    908,335,650.75x = 1,253,503,701.84 × 490,647,938.32
  4. Step 4: Simplify right side
    908,335,650.75x = 615,029,006,984,283,904
  5. Step 5: Solve for x
    x = 615,029,006,984,283,904/908,335,650.75
  6. Step 6: Final answer
    x = 677,094,427.02

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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.