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Finding the Fourth Proportional to 399,889.91, 551,848.11 and 218,602.64

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Solution

The fourth proportional to 399,889.91, 551,848.11 and 218,602.64 is: 301,671.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,889.91 : 551,848.11 = 218,602.64 : x
  2. Step 2: Convert to fraction form
    399,889.91/551,848.11 = 218,602.64/x
  3. Step 3: Cross multiply
    399,889.91x = 551,848.11 × 218,602.64
  4. Step 4: Simplify right side
    399,889.91x = 120,635,455,104.63
  5. Step 5: Solve for x
    x = 120,635,455,104.63/399,889.91
  6. Step 6: Final answer
    x = 301,671.67

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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.