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Finding the Fourth Proportional to 391,973,747.53, 540,938,046 and 213,349,003.33

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Solution

The fourth proportional to 391,973,747.53, 540,938,046 and 213,349,003.33 is: 294,429,394.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,973,747.53 : 540,938,046 = 213,349,003.33 : x
  2. Step 2: Convert to fraction form
    391,973,747.53/540,938,046 = 213,349,003.33/x
  3. Step 3: Cross multiply
    391,973,747.53x = 540,938,046 × 213,349,003.33
  4. Step 4: Simplify right side
    391,973,747.53x = 115,408,592,977,377,696
  5. Step 5: Solve for x
    x = 115,408,592,977,377,696/391,973,747.53
  6. Step 6: Final answer
    x = 294,429,394.07

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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.