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Finding the Fourth Proportional to 6,461,783.78, 8,917,261.65 and 3,561,174.69

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Solution

The fourth proportional to 6,461,783.78, 8,917,261.65 and 3,561,174.69 is: 4,914,421.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,461,783.78 : 8,917,261.65 = 3,561,174.69 : x
  2. Step 2: Convert to fraction form
    6,461,783.78/8,917,261.65 = 3,561,174.69/x
  3. Step 3: Cross multiply
    6,461,783.78x = 8,917,261.65 × 3,561,174.69
  4. Step 4: Simplify right side
    6,461,783.78x = 31,755,926,458,647.91
  5. Step 5: Solve for x
    x = 31,755,926,458,647.91/6,461,783.78
  6. Step 6: Final answer
    x = 4,914,421.09

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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.