Home / 399,971.31-551,961.40-218,694.93

Finding the Fourth Proportional to 399,971.31, 551,961.40 and 218,694.93

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Solution

The fourth proportional to 399,971.31, 551,961.40 and 218,694.93 is: 301,799.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,971.31 : 551,961.40 = 218,694.93 : x
  2. Step 2: Convert to fraction form
    399,971.31/551,961.40 = 218,694.93/x
  3. Step 3: Cross multiply
    399,971.31x = 551,961.40 × 218,694.93
  4. Step 4: Simplify right side
    399,971.31x = 120,711,159,735.70
  5. Step 5: Solve for x
    x = 120,711,159,735.70/399,971.31
  6. Step 6: Final answer
    x = 301,799.55

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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.