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Finding the Fourth Proportional to 636,436,394.80, 878,273,404.68 and 357,978,106.96

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Solution

The fourth proportional to 636,436,394.80, 878,273,404.68 and 357,978,106.96 is: 494,004,826.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,436,394.80 : 878,273,404.68 = 357,978,106.96 : x
  2. Step 2: Convert to fraction form
    636,436,394.80/878,273,404.68 = 357,978,106.96/x
  3. Step 3: Cross multiply
    636,436,394.80x = 878,273,404.68 × 357,978,106.96
  4. Step 4: Simplify right side
    636,436,394.80x = 314,402,650,800,660,352
  5. Step 5: Solve for x
    x = 314,402,650,800,660,352/636,436,394.80
  6. Step 6: Final answer
    x = 494,004,826.51

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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.