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Finding the Fourth Proportional to 425,981,207.70, 638,971,811.55 and 380,064,705.30

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Solution

The fourth proportional to 425,981,207.70, 638,971,811.55 and 380,064,705.30 is: 570,097,057.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,981,207.70 : 638,971,811.55 = 380,064,705.30 : x
  2. Step 2: Convert to fraction form
    425,981,207.70/638,971,811.55 = 380,064,705.30/x
  3. Step 3: Cross multiply
    425,981,207.70x = 638,971,811.55 × 380,064,705.30
  4. Step 4: Simplify right side
    425,981,207.70x = 242,850,633,251,757,888
  5. Step 5: Solve for x
    x = 242,850,633,251,757,888/425,981,207.70
  6. Step 6: Final answer
    x = 570,097,057.95

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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.