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Finding the Fourth Proportional to 429,783.30, 643,788.99 and 251,750.57

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Solution

The fourth proportional to 429,783.30, 643,788.99 and 251,750.57 is: 377,106.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,783.30 : 643,788.99 = 251,750.57 : x
  2. Step 2: Convert to fraction form
    429,783.30/643,788.99 = 251,750.57/x
  3. Step 3: Cross multiply
    429,783.30x = 643,788.99 × 251,750.57
  4. Step 4: Simplify right side
    429,783.30x = 162,074,241,973.28
  5. Step 5: Solve for x
    x = 162,074,241,973.28/429,783.30
  6. Step 6: Final answer
    x = 377,106.89

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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.