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Finding the Fourth Proportional to 343,883.40, 515,970.90 and 217,620.60

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Solution

The fourth proportional to 343,883.40, 515,970.90 and 217,620.60 is: 326,523.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,883.40 : 515,970.90 = 217,620.60 : x
  2. Step 2: Convert to fraction form
    343,883.40/515,970.90 = 217,620.60/x
  3. Step 3: Cross multiply
    343,883.40x = 515,970.90 × 217,620.60
  4. Step 4: Simplify right side
    343,883.40x = 112,285,896,840.54
  5. Step 5: Solve for x
    x = 112,285,896,840.54/343,883.40
  6. Step 6: Final answer
    x = 326,523.17

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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.