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Finding the Fourth Proportional to 328,055,878.40, 491,747,894.40 and 191,671,059.20

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Solution

The fourth proportional to 328,055,878.40, 491,747,894.40 and 191,671,059.20 is: 287,310,321.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,055,878.40 : 491,747,894.40 = 191,671,059.20 : x
  2. Step 2: Convert to fraction form
    328,055,878.40/491,747,894.40 = 191,671,059.20/x
  3. Step 3: Cross multiply
    328,055,878.40x = 491,747,894.40 × 191,671,059.20
  4. Step 4: Simplify right side
    328,055,878.40x = 94,253,839,779,017,744
  5. Step 5: Solve for x
    x = 94,253,839,779,017,744/328,055,878.40
  6. Step 6: Final answer
    x = 287,310,321.15

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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.