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Finding the Fourth Proportional to 429,039.95, 639,769.31 and 425,189.08

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Solution

The fourth proportional to 429,039.95, 639,769.31 and 425,189.08 is: 634,027.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,039.95 : 639,769.31 = 425,189.08 : x
  2. Step 2: Convert to fraction form
    429,039.95/639,769.31 = 425,189.08/x
  3. Step 3: Cross multiply
    429,039.95x = 639,769.31 × 425,189.08
  4. Step 4: Simplify right side
    429,039.95x = 272,022,925,205.35
  5. Step 5: Solve for x
    x = 272,022,925,205.35/429,039.95
  6. Step 6: Final answer
    x = 634,027.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.