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Finding the Fourth Proportional to 663,868,479, 916,551,954.77 and 422,600,586.39

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Solution

The fourth proportional to 663,868,479, 916,551,954.77 and 422,600,586.39 is: 583,452,002.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,868,479 : 916,551,954.77 = 422,600,586.39 : x
  2. Step 2: Convert to fraction form
    663,868,479/916,551,954.77 = 422,600,586.39/x
  3. Step 3: Cross multiply
    663,868,479x = 916,551,954.77 × 422,600,586.39
  4. Step 4: Simplify right side
    663,868,479x = 387,335,393,540,589,760
  5. Step 5: Solve for x
    x = 387,335,393,540,589,760/663,868,479
  6. Step 6: Final answer
    x = 583,452,002.61

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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.