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Finding the Fourth Proportional to 425,629,201.45, 638,443,802.18 and 425,629,201.45

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Solution

The fourth proportional to 425,629,201.45, 638,443,802.18 and 425,629,201.45 is: 638,443,802.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,629,201.45 : 638,443,802.18 = 425,629,201.45 : x
  2. Step 2: Convert to fraction form
    425,629,201.45/638,443,802.18 = 425,629,201.45/x
  3. Step 3: Cross multiply
    425,629,201.45x = 638,443,802.18 × 425,629,201.45
  4. Step 4: Simplify right side
    425,629,201.45x = 271,740,325,692,575,136
  5. Step 5: Solve for x
    x = 271,740,325,692,575,136/425,629,201.45
  6. Step 6: Final answer
    x = 638,443,802.18

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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.