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Finding the Fourth Proportional to 381,849,662.60, 572,774,493.90 and 218,590,987.40

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Solution

The fourth proportional to 381,849,662.60, 572,774,493.90 and 218,590,987.40 is: 327,886,481.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,849,662.60 : 572,774,493.90 = 218,590,987.40 : x
  2. Step 2: Convert to fraction form
    381,849,662.60/572,774,493.90 = 218,590,987.40/x
  3. Step 3: Cross multiply
    381,849,662.60x = 572,774,493.90 × 218,590,987.40
  4. Step 4: Simplify right side
    381,849,662.60x = 125,203,342,179,136,272
  5. Step 5: Solve for x
    x = 125,203,342,179,136,272/381,849,662.60
  6. Step 6: Final answer
    x = 327,886,481.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.