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Finding the Fourth Proportional to 425,674.05, 638,492.63 and 105,819.23

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Solution

The fourth proportional to 425,674.05, 638,492.63 and 105,819.23 is: 158,724.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,674.05 : 638,492.63 = 105,819.23 : x
  2. Step 2: Convert to fraction form
    425,674.05/638,492.63 = 105,819.23/x
  3. Step 3: Cross multiply
    425,674.05x = 638,492.63 × 105,819.23
  4. Step 4: Simplify right side
    425,674.05x = 67,564,795,942.89
  5. Step 5: Solve for x
    x = 67,564,795,942.89/425,674.05
  6. Step 6: Final answer
    x = 158,724.25

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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.