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Finding the Fourth Proportional to 343,881.40, 515,967.90 and 217,618.60

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Solution

The fourth proportional to 343,881.40, 515,967.90 and 217,618.60 is: 326,520.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,881.40 : 515,967.90 = 217,618.60 : x
  2. Step 2: Convert to fraction form
    343,881.40/515,967.90 = 217,618.60/x
  3. Step 3: Cross multiply
    343,881.40x = 515,967.90 × 217,618.60
  4. Step 4: Simplify right side
    343,881.40x = 112,284,212,042.94
  5. Step 5: Solve for x
    x = 112,284,212,042.94/343,881.40
  6. Step 6: Final answer
    x = 326,520.17

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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.