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Finding the Fourth Proportional to 485,879.60, 670,399.76 and 294,888.56

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Solution

The fourth proportional to 485,879.60, 670,399.76 and 294,888.56 is: 406,876.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,879.60 : 670,399.76 = 294,888.56 : x
  2. Step 2: Convert to fraction form
    485,879.60/670,399.76 = 294,888.56/x
  3. Step 3: Cross multiply
    485,879.60x = 670,399.76 × 294,888.56
  4. Step 4: Simplify right side
    485,879.60x = 197,693,219,850.75
  5. Step 5: Solve for x
    x = 197,693,219,850.75/485,879.60
  6. Step 6: Final answer
    x = 406,876.97

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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.