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Finding the Fourth Proportional to 638,523.09, 881,145 and 352,035.81

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Solution

The fourth proportional to 638,523.09, 881,145 and 352,035.81 is: 485,800.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,523.09 : 881,145 = 352,035.81 : x
  2. Step 2: Convert to fraction form
    638,523.09/881,145 = 352,035.81/x
  3. Step 3: Cross multiply
    638,523.09x = 881,145 × 352,035.81
  4. Step 4: Simplify right side
    638,523.09x = 310,194,593,802.45
  5. Step 5: Solve for x
    x = 310,194,593,802.45/638,523.09
  6. Step 6: Final answer
    x = 485,800.12

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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.