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Finding the Fourth Proportional to 399,245.37, 550,957.32 and 217,959.54

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Solution

The fourth proportional to 399,245.37, 550,957.32 and 217,959.54 is: 300,783.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,245.37 : 550,957.32 = 217,959.54 : x
  2. Step 2: Convert to fraction form
    399,245.37/550,957.32 = 217,959.54/x
  3. Step 3: Cross multiply
    399,245.37x = 550,957.32 × 217,959.54
  4. Step 4: Simplify right side
    399,245.37x = 120,086,404,026.83
  5. Step 5: Solve for x
    x = 120,086,404,026.83/399,245.37
  6. Step 6: Final answer
    x = 300,783.46

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1.5x scale

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.