Home / 399,426.39-551,211.48-218,135.03

Finding the Fourth Proportional to 399,426.39, 551,211.48 and 218,135.03

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Solution

The fourth proportional to 399,426.39, 551,211.48 and 218,135.03 is: 301,028.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,426.39 : 551,211.48 = 218,135.03 : x
  2. Step 2: Convert to fraction form
    399,426.39/551,211.48 = 218,135.03/x
  3. Step 3: Cross multiply
    399,426.39x = 551,211.48 × 218,135.03
  4. Step 4: Simplify right side
    399,426.39x = 120,238,529,970.09
  5. Step 5: Solve for x
    x = 120,238,529,970.09/399,426.39
  6. Step 6: Final answer
    x = 301,028.01

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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.