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Finding the Fourth Proportional to 888,387, 1,226,003.31 and 485,979

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Solution

The fourth proportional to 888,387, 1,226,003.31 and 485,979 is: 670,667.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    888,387 : 1,226,003.31 = 485,979 : x
  2. Step 2: Convert to fraction form
    888,387/1,226,003.31 = 485,979/x
  3. Step 3: Cross multiply
    888,387x = 1,226,003.31 × 485,979
  4. Step 4: Simplify right side
    888,387x = 595,811,862,590.49
  5. Step 5: Solve for x
    x = 595,811,862,590.49/888,387
  6. Step 6: Final answer
    x = 670,667.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.