Home / 399,534.20-551,336.10-218,243.50

Finding the Fourth Proportional to 399,534.20, 551,336.10 and 218,243.50

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Solution

The fourth proportional to 399,534.20, 551,336.10 and 218,243.50 is: 301,164.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,534.20 : 551,336.10 = 218,243.50 : x
  2. Step 2: Convert to fraction form
    399,534.20/551,336.10 = 218,243.50/x
  3. Step 3: Cross multiply
    399,534.20x = 551,336.10 × 218,243.50
  4. Step 4: Simplify right side
    399,534.20x = 120,325,520,140.35
  5. Step 5: Solve for x
    x = 120,325,520,140.35/399,534.20
  6. Step 6: Final answer
    x = 301,164.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.