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Finding the Fourth Proportional to 343,990.80, 515,986.20 and 330,212.70

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Solution

The fourth proportional to 343,990.80, 515,986.20 and 330,212.70 is: 495,319.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,990.80 : 515,986.20 = 330,212.70 : x
  2. Step 2: Convert to fraction form
    343,990.80/515,986.20 = 330,212.70/x
  3. Step 3: Cross multiply
    343,990.80x = 515,986.20 × 330,212.70
  4. Step 4: Simplify right side
    343,990.80x = 170,385,196,264.74
  5. Step 5: Solve for x
    x = 170,385,196,264.74/343,990.80
  6. Step 6: Final answer
    x = 495,319.05

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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.