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Finding the Fourth Proportional to 1,119,171,978.60, 1,678,757,967.90 and 885,369,431.40

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Solution

The fourth proportional to 1,119,171,978.60, 1,678,757,967.90 and 885,369,431.40 is: 1,328,054,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119,171,978.60 : 1,678,757,967.90 = 885,369,431.40 : x
  2. Step 2: Convert to fraction form
    1,119,171,978.60/1,678,757,967.90 = 885,369,431.40/x
  3. Step 3: Cross multiply
    1,119,171,978.60x = 1,678,757,967.90 × 885,369,431.40
  4. Step 4: Simplify right side
    1,119,171,978.60x = 1,486,320,987,497,842,432
  5. Step 5: Solve for x
    x = 1,486,320,987,497,842,432/1,119,171,978.60
  6. Step 6: Final answer
    x = 1,328,054,147.10

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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.