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Finding the Fourth Proportional to 638,570,600.70, 957,855,901.05 and 395,445,147.90

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Solution

The fourth proportional to 638,570,600.70, 957,855,901.05 and 395,445,147.90 is: 593,167,721.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,570,600.70 : 957,855,901.05 = 395,445,147.90 : x
  2. Step 2: Convert to fraction form
    638,570,600.70/957,855,901.05 = 395,445,147.90/x
  3. Step 3: Cross multiply
    638,570,600.70x = 957,855,901.05 × 395,445,147.90
  4. Step 4: Simplify right side
    638,570,600.70x = 378,779,468,457,604,992
  5. Step 5: Solve for x
    x = 378,779,468,457,604,992/638,570,600.70
  6. Step 6: Final answer
    x = 593,167,721.85

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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.