Home / 638,810,105.70-958,215,158.55-420,706,719.30

Finding the Fourth Proportional to 638,810,105.70, 958,215,158.55 and 420,706,719.30

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Solution

The fourth proportional to 638,810,105.70, 958,215,158.55 and 420,706,719.30 is: 631,060,078.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,810,105.70 : 958,215,158.55 = 420,706,719.30 : x
  2. Step 2: Convert to fraction form
    638,810,105.70/958,215,158.55 = 420,706,719.30/x
  3. Step 3: Cross multiply
    638,810,105.70x = 958,215,158.55 × 420,706,719.30
  4. Step 4: Simplify right side
    638,810,105.70x = 403,127,555,737,099,840
  5. Step 5: Solve for x
    x = 403,127,555,737,099,840/638,810,105.70
  6. Step 6: Final answer
    x = 631,060,078.95

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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.