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Finding the Fourth Proportional to 425,859.86, 638,789.76 and 110,316.75

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Solution

The fourth proportional to 425,859.86, 638,789.76 and 110,316.75 is: 165,475.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,859.86 : 638,789.76 = 110,316.75 : x
  2. Step 2: Convert to fraction form
    425,859.86/638,789.76 = 110,316.75/x
  3. Step 3: Cross multiply
    425,859.86x = 638,789.76 × 110,316.75
  4. Step 4: Simplify right side
    425,859.86x = 70,469,210,256.48
  5. Step 5: Solve for x
    x = 70,469,210,256.48/425,859.86
  6. Step 6: Final answer
    x = 165,475.12

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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.