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Finding the Fourth Proportional to 399,957.18, 551,951.34 and 218,676.76

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Solution

The fourth proportional to 399,957.18, 551,951.34 and 218,676.76 is: 301,779.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,957.18 : 551,951.34 = 218,676.76 : x
  2. Step 2: Convert to fraction form
    399,957.18/551,951.34 = 218,676.76/x
  3. Step 3: Cross multiply
    399,957.18x = 551,951.34 × 218,676.76
  4. Step 4: Simplify right side
    399,957.18x = 120,698,930,708.86
  5. Step 5: Solve for x
    x = 120,698,930,708.86/399,957.18
  6. Step 6: Final answer
    x = 301,779.63

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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.