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Finding the Fourth Proportional to 343,162.80, 515,334.69 and 328,400.55

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Solution

The fourth proportional to 343,162.80, 515,334.69 and 328,400.55 is: 493,165.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,162.80 : 515,334.69 = 328,400.55 : x
  2. Step 2: Convert to fraction form
    343,162.80/515,334.69 = 328,400.55/x
  3. Step 3: Cross multiply
    343,162.80x = 515,334.69 × 328,400.55
  4. Step 4: Simplify right side
    343,162.80x = 169,236,195,630.08
  5. Step 5: Solve for x
    x = 169,236,195,630.08/343,162.80
  6. Step 6: Final answer
    x = 493,165.91

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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.