Home / 399,932.79-551,909.20-218,644.73

Finding the Fourth Proportional to 399,932.79, 551,909.20 and 218,644.73

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Solution

The fourth proportional to 399,932.79, 551,909.20 and 218,644.73 is: 301,730.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,932.79 : 551,909.20 = 218,644.73 : x
  2. Step 2: Convert to fraction form
    399,932.79/551,909.20 = 218,644.73/x
  3. Step 3: Cross multiply
    399,932.79x = 551,909.20 × 218,644.73
  4. Step 4: Simplify right side
    399,932.79x = 120,672,038,018.52
  5. Step 5: Solve for x
    x = 120,672,038,018.52/399,932.79
  6. Step 6: Final answer
    x = 301,730.79

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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.