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Finding the Fourth Proportional to 677,469.33, 934,840.30 and 391,081.68

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Solution

The fourth proportional to 677,469.33, 934,840.30 and 391,081.68 is: 539,653.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,469.33 : 934,840.30 = 391,081.68 : x
  2. Step 2: Convert to fraction form
    677,469.33/934,840.30 = 391,081.68/x
  3. Step 3: Cross multiply
    677,469.33x = 934,840.30 × 391,081.68
  4. Step 4: Simplify right side
    677,469.33x = 365,598,915,055.70
  5. Step 5: Solve for x
    x = 365,598,915,055.70/677,469.33
  6. Step 6: Final answer
    x = 539,653.82

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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.