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Finding the Fourth Proportional to 556,678,719.63, 768,171,832.56 and 321,744,596.76

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Solution

The fourth proportional to 556,678,719.63, 768,171,832.56 and 321,744,596.76 is: 443,981,650.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,678,719.63 : 768,171,832.56 = 321,744,596.76 : x
  2. Step 2: Convert to fraction form
    556,678,719.63/768,171,832.56 = 321,744,596.76/x
  3. Step 3: Cross multiply
    556,678,719.63x = 768,171,832.56 × 321,744,596.76
  4. Step 4: Simplify right side
    556,678,719.63x = 247,155,136,509,407,424
  5. Step 5: Solve for x
    x = 247,155,136,509,407,424/556,678,719.63
  6. Step 6: Final answer
    x = 443,981,650.09

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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.