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Finding the Fourth Proportional to 395,013.98, 545,121.14 and 222,939.19

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Solution

The fourth proportional to 395,013.98, 545,121.14 and 222,939.19 is: 307,657.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,013.98 : 545,121.14 = 222,939.19 : x
  2. Step 2: Convert to fraction form
    395,013.98/545,121.14 = 222,939.19/x
  3. Step 3: Cross multiply
    395,013.98x = 545,121.14 × 222,939.19
  4. Step 4: Simplify right side
    395,013.98x = 121,528,866,607.51
  5. Step 5: Solve for x
    x = 121,528,866,607.51/395,013.98
  6. Step 6: Final answer
    x = 307,657.13

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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.