Home / 399,383,678.49-551,138,900.04-223,173,121.79

Finding the Fourth Proportional to 399,383,678.49, 551,138,900.04 and 223,173,121.79

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Solution

The fourth proportional to 399,383,678.49, 551,138,900.04 and 223,173,121.79 is: 307,972,998.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,383,678.49 : 551,138,900.04 = 223,173,121.79 : x
  2. Step 2: Convert to fraction form
    399,383,678.49/551,138,900.04 = 223,173,121.79/x
  3. Step 3: Cross multiply
    399,383,678.49x = 551,138,900.04 × 223,173,121.79
  4. Step 4: Simplify right side
    399,383,678.49x = 122,999,388,859,077,856
  5. Step 5: Solve for x
    x = 122,999,388,859,077,856/399,383,678.49
  6. Step 6: Final answer
    x = 307,972,998.11

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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.