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Finding the Fourth Proportional to 399,676.36, 551,546.70 and 218,384.32

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Solution

The fourth proportional to 399,676.36, 551,546.70 and 218,384.32 is: 301,366.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,676.36 : 551,546.70 = 218,384.32 : x
  2. Step 2: Convert to fraction form
    399,676.36/551,546.70 = 218,384.32/x
  3. Step 3: Cross multiply
    399,676.36x = 551,546.70 × 218,384.32
  4. Step 4: Simplify right side
    399,676.36x = 120,449,151,027.74
  5. Step 5: Solve for x
    x = 120,449,151,027.74/399,676.36
  6. Step 6: Final answer
    x = 301,366.71

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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.