Home / 391,798,930.32-540,666,313.38-213,183,553.84

Finding the Fourth Proportional to 391,798,930.32, 540,666,313.38 and 213,183,553.84

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Solution

The fourth proportional to 391,798,930.32, 540,666,313.38 and 213,183,553.84 is: 294,184,483.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,798,930.32 : 540,666,313.38 = 213,183,553.84 : x
  2. Step 2: Convert to fraction form
    391,798,930.32/540,666,313.38 = 213,183,553.84/x
  3. Step 3: Cross multiply
    391,798,930.32x = 540,666,313.38 × 213,183,553.84
  4. Step 4: Simplify right side
    391,798,930.32x = 115,261,166,126,567,872
  5. Step 5: Solve for x
    x = 115,261,166,126,567,872/391,798,930.32
  6. Step 6: Final answer
    x = 294,184,483.95

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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.