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Finding the Fourth Proportional to 425,628,665.70, 638,442,998.55 and 425,628,665.70

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Solution

The fourth proportional to 425,628,665.70, 638,442,998.55 and 425,628,665.70 is: 638,442,998.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,628,665.70 : 638,442,998.55 = 425,628,665.70 : x
  2. Step 2: Convert to fraction form
    425,628,665.70/638,442,998.55 = 425,628,665.70/x
  3. Step 3: Cross multiply
    425,628,665.70x = 638,442,998.55 × 425,628,665.70
  4. Step 4: Simplify right side
    425,628,665.70x = 271,739,641,598,343,520
  5. Step 5: Solve for x
    x = 271,739,641,598,343,520/425,628,665.70
  6. Step 6: Final answer
    x = 638,442,998.55

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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.