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Finding the Fourth Proportional to 399,651.81, 551,518.63 and 218,365.03

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Solution

The fourth proportional to 399,651.81, 551,518.63 and 218,365.03 is: 301,343.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,651.81 : 551,518.63 = 218,365.03 : x
  2. Step 2: Convert to fraction form
    399,651.81/551,518.63 = 218,365.03/x
  3. Step 3: Cross multiply
    399,651.81x = 551,518.63 × 218,365.03
  4. Step 4: Simplify right side
    399,651.81x = 120,432,382,185.51
  5. Step 5: Solve for x
    x = 120,432,382,185.51/399,651.81
  6. Step 6: Final answer
    x = 301,343.27

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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.