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Finding the Fourth Proportional to 399,618.51, 551,474.01 and 218,333.49

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Solution

The fourth proportional to 399,618.51, 551,474.01 and 218,333.49 is: 301,300.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,618.51 : 551,474.01 = 218,333.49 : x
  2. Step 2: Convert to fraction form
    399,618.51/551,474.01 = 218,333.49/x
  3. Step 3: Cross multiply
    399,618.51x = 551,474.01 × 218,333.49
  4. Step 4: Simplify right side
    399,618.51x = 120,405,245,247.60
  5. Step 5: Solve for x
    x = 120,405,245,247.60/399,618.51
  6. Step 6: Final answer
    x = 301,300.47

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1.5x scale

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.