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Finding the Fourth Proportional to 888,386, 1,226,001.93 and 485,978

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Solution

The fourth proportional to 888,386, 1,226,001.93 and 485,978 is: 670,665.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    888,386 : 1,226,001.93 = 485,978 : x
  2. Step 2: Convert to fraction form
    888,386/1,226,001.93 = 485,978/x
  3. Step 3: Cross multiply
    888,386x = 1,226,001.93 × 485,978
  4. Step 4: Simplify right side
    888,386x = 595,809,965,937.54
  5. Step 5: Solve for x
    x = 595,809,965,937.54/888,386
  6. Step 6: Final answer
    x = 670,665.64

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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.