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Finding the Fourth Proportional to 425,981,162.20, 638,971,743.30 and 380,064,659.80

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Solution

The fourth proportional to 425,981,162.20, 638,971,743.30 and 380,064,659.80 is: 570,096,989.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,981,162.20 : 638,971,743.30 = 380,064,659.80 : x
  2. Step 2: Convert to fraction form
    425,981,162.20/638,971,743.30 = 380,064,659.80/x
  3. Step 3: Cross multiply
    425,981,162.20x = 638,971,743.30 × 380,064,659.80
  4. Step 4: Simplify right side
    425,981,162.20x = 242,850,578,239,127,424
  5. Step 5: Solve for x
    x = 242,850,578,239,127,424/425,981,162.20
  6. Step 6: Final answer
    x = 570,096,989.70

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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.