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Finding the Fourth Proportional to 425,356.36, 638,329.21 and 169,162.67

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Solution

The fourth proportional to 425,356.36, 638,329.21 and 169,162.67 is: 253,861.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,356.36 : 638,329.21 = 169,162.67 : x
  2. Step 2: Convert to fraction form
    425,356.36/638,329.21 = 169,162.67/x
  3. Step 3: Cross multiply
    425,356.36x = 638,329.21 × 169,162.67
  4. Step 4: Simplify right side
    425,356.36x = 107,981,474,675.51
  5. Step 5: Solve for x
    x = 107,981,474,675.51/425,356.36
  6. Step 6: Final answer
    x = 253,861.20

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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.