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Finding the Fourth Proportional to 429,776.97, 643,779.51 and 251,744.23

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Solution

The fourth proportional to 429,776.97, 643,779.51 and 251,744.23 is: 377,097.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,776.97 : 643,779.51 = 251,744.23 : x
  2. Step 2: Convert to fraction form
    429,776.97/643,779.51 = 251,744.23/x
  3. Step 3: Cross multiply
    429,776.97x = 643,779.51 × 251,744.23
  4. Step 4: Simplify right side
    429,776.97x = 162,067,777,034.73
  5. Step 5: Solve for x
    x = 162,067,777,034.73/429,776.97
  6. Step 6: Final answer
    x = 377,097.40

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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.