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Finding the Fourth Proportional to 420,818.76, 631,310.49 and 154,581.39

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Solution

The fourth proportional to 420,818.76, 631,310.49 and 154,581.39 is: 231,902.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,818.76 : 631,310.49 = 154,581.39 : x
  2. Step 2: Convert to fraction form
    420,818.76/631,310.49 = 154,581.39/x
  3. Step 3: Cross multiply
    420,818.76x = 631,310.49 × 154,581.39
  4. Step 4: Simplify right side
    420,818.76x = 97,588,853,065.78
  5. Step 5: Solve for x
    x = 97,588,853,065.78/420,818.76
  6. Step 6: Final answer
    x = 231,902.34

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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.