Home / 399,419.64-551,196.31-218,131.62

Finding the Fourth Proportional to 399,419.64, 551,196.31 and 218,131.62

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Solution

The fourth proportional to 399,419.64, 551,196.31 and 218,131.62 is: 301,020.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,419.64 : 551,196.31 = 218,131.62 : x
  2. Step 2: Convert to fraction form
    399,419.64/551,196.31 = 218,131.62/x
  3. Step 3: Cross multiply
    399,419.64x = 551,196.31 × 218,131.62
  4. Step 4: Simplify right side
    399,419.64x = 120,233,344,038.32
  5. Step 5: Solve for x
    x = 120,233,344,038.32/399,419.64
  6. Step 6: Final answer
    x = 301,020.11

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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.