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Finding the Fourth Proportional to 343,820.40, 515,730.60 and 217,849.20

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Solution

The fourth proportional to 343,820.40, 515,730.60 and 217,849.20 is: 326,773.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,820.40 : 515,730.60 = 217,849.20 : x
  2. Step 2: Convert to fraction form
    343,820.40/515,730.60 = 217,849.20/x
  3. Step 3: Cross multiply
    343,820.40x = 515,730.60 × 217,849.20
  4. Step 4: Simplify right side
    343,820.40x = 112,351,498,625.52
  5. Step 5: Solve for x
    x = 112,351,498,625.52/343,820.40
  6. Step 6: Final answer
    x = 326,773.80

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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.