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Finding the Fourth Proportional to 343,908.40, 515,862.60 and 217,937.20

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Solution

The fourth proportional to 343,908.40, 515,862.60 and 217,937.20 is: 326,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,908.40 : 515,862.60 = 217,937.20 : x
  2. Step 2: Convert to fraction form
    343,908.40/515,862.60 = 217,937.20/x
  3. Step 3: Cross multiply
    343,908.40x = 515,862.60 × 217,937.20
  4. Step 4: Simplify right side
    343,908.40x = 112,425,650,628.72
  5. Step 5: Solve for x
    x = 112,425,650,628.72/343,908.40
  6. Step 6: Final answer
    x = 326,905.80

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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.