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Finding the Fourth Proportional to 351,355.73, 485,688.09 and 313,490.57

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Solution

The fourth proportional to 351,355.73, 485,688.09 and 313,490.57 is: 433,346.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,355.73 : 485,688.09 = 313,490.57 : x
  2. Step 2: Convert to fraction form
    351,355.73/485,688.09 = 313,490.57/x
  3. Step 3: Cross multiply
    351,355.73x = 485,688.09 × 313,490.57
  4. Step 4: Simplify right side
    351,355.73x = 152,258,636,176.31
  5. Step 5: Solve for x
    x = 152,258,636,176.31/351,355.73
  6. Step 6: Final answer
    x = 433,346.10

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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.