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Finding the Fourth Proportional to 343,894.20, 515,841.30 and 255,320.70

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Solution

The fourth proportional to 343,894.20, 515,841.30 and 255,320.70 is: 382,981.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,894.20 : 515,841.30 = 255,320.70 : x
  2. Step 2: Convert to fraction form
    343,894.20/515,841.30 = 255,320.70/x
  3. Step 3: Cross multiply
    343,894.20x = 515,841.30 × 255,320.70
  4. Step 4: Simplify right side
    343,894.20x = 131,704,961,804.91
  5. Step 5: Solve for x
    x = 131,704,961,804.91/343,894.20
  6. Step 6: Final answer
    x = 382,981.05

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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.