Home / 390,512,137.96-538,910,815.76-214,311,545.79

Finding the Fourth Proportional to 390,512,137.96, 538,910,815.76 and 214,311,545.79

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Solution

The fourth proportional to 390,512,137.96, 538,910,815.76 and 214,311,545.79 is: 295,752,164.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,512,137.96 : 538,910,815.76 = 214,311,545.79 : x
  2. Step 2: Convert to fraction form
    390,512,137.96/538,910,815.76 = 214,311,545.79/x
  3. Step 3: Cross multiply
    390,512,137.96x = 538,910,815.76 × 214,311,545.79
  4. Step 4: Simplify right side
    390,512,137.96x = 115,494,809,968,475,488
  5. Step 5: Solve for x
    x = 115,494,809,968,475,488/390,512,137.96
  6. Step 6: Final answer
    x = 295,752,164.25

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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.