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Finding the Fourth Proportional to 619,307,356.40, 928,961,034.60 and 251,018,743.40

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Solution

The fourth proportional to 619,307,356.40, 928,961,034.60 and 251,018,743.40 is: 376,528,115.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,307,356.40 : 928,961,034.60 = 251,018,743.40 : x
  2. Step 2: Convert to fraction form
    619,307,356.40/928,961,034.60 = 251,018,743.40/x
  3. Step 3: Cross multiply
    619,307,356.40x = 928,961,034.60 × 251,018,743.40
  4. Step 4: Simplify right side
    619,307,356.40x = 233,186,631,572,855,936
  5. Step 5: Solve for x
    x = 233,186,631,572,855,936/619,307,356.40
  6. Step 6: Final answer
    x = 376,528,115.10

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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.