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Finding the Fourth Proportional to 638,861, 881,632.26 and 352,388.84

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Solution

The fourth proportional to 638,861, 881,632.26 and 352,388.84 is: 486,298.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,861 : 881,632.26 = 352,388.84 : x
  2. Step 2: Convert to fraction form
    638,861/881,632.26 = 352,388.84/x
  3. Step 3: Cross multiply
    638,861x = 881,632.26 × 352,388.84
  4. Step 4: Simplify right side
    638,861x = 310,677,369,407.98
  5. Step 5: Solve for x
    x = 310,677,369,407.98/638,861
  6. Step 6: Final answer
    x = 486,298.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.