Home / 391,900,942.77-540,813,347.37-213,277,238.25

Finding the Fourth Proportional to 391,900,942.77, 540,813,347.37 and 213,277,238.25

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Solution

The fourth proportional to 391,900,942.77, 540,813,347.37 and 213,277,238.25 is: 294,317,171.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,900,942.77 : 540,813,347.37 = 213,277,238.25 : x
  2. Step 2: Convert to fraction form
    391,900,942.77/540,813,347.37 = 213,277,238.25/x
  3. Step 3: Cross multiply
    391,900,942.77x = 540,813,347.37 × 213,277,238.25
  4. Step 4: Simplify right side
    391,900,942.77x = 115,343,177,135,811,504
  5. Step 5: Solve for x
    x = 115,343,177,135,811,504/391,900,942.77
  6. Step 6: Final answer
    x = 294,317,171.89

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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.