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Finding the Fourth Proportional to 343,920.22, 515,530.41 and 318,463.54

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Solution

The fourth proportional to 343,920.22, 515,530.41 and 318,463.54 is: 477,371.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,920.22 : 515,530.41 = 318,463.54 : x
  2. Step 2: Convert to fraction form
    343,920.22/515,530.41 = 318,463.54/x
  3. Step 3: Cross multiply
    343,920.22x = 515,530.41 × 318,463.54
  4. Step 4: Simplify right side
    343,920.22x = 164,177,639,346.25
  5. Step 5: Solve for x
    x = 164,177,639,346.25/343,920.22
  6. Step 6: Final answer
    x = 477,371.29

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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.