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Finding the Fourth Proportional to 323,355.29, 485,240.53 and 216,859.51

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Solution

The fourth proportional to 323,355.29, 485,240.53 and 216,859.51 is: 325,428.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,355.29 : 485,240.53 = 216,859.51 : x
  2. Step 2: Convert to fraction form
    323,355.29/485,240.53 = 216,859.51/x
  3. Step 3: Cross multiply
    323,355.29x = 485,240.53 × 216,859.51
  4. Step 4: Simplify right side
    323,355.29x = 105,229,021,812.69
  5. Step 5: Solve for x
    x = 105,229,021,812.69/323,355.29
  6. Step 6: Final answer
    x = 325,428.48

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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.