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Finding the Fourth Proportional to 395,081.98, 545,212.49 and 223,036.16

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Solution

The fourth proportional to 395,081.98, 545,212.49 and 223,036.16 is: 307,789.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,081.98 : 545,212.49 = 223,036.16 : x
  2. Step 2: Convert to fraction form
    395,081.98/545,212.49 = 223,036.16/x
  3. Step 3: Cross multiply
    395,081.98x = 545,212.49 × 223,036.16
  4. Step 4: Simplify right side
    395,081.98x = 121,602,096,312.40
  5. Step 5: Solve for x
    x = 121,602,096,312.40/395,081.98
  6. Step 6: Final answer
    x = 307,789.53

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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.