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Finding the Fourth Proportional to 395,485.47, 545,817.89 and 223,410.69

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Solution

The fourth proportional to 395,485.47, 545,817.89 and 223,410.69 is: 308,333.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,485.47 : 545,817.89 = 223,410.69 : x
  2. Step 2: Convert to fraction form
    395,485.47/545,817.89 = 223,410.69/x
  3. Step 3: Cross multiply
    395,485.47x = 545,817.89 × 223,410.69
  4. Step 4: Simplify right side
    395,485.47x = 121,941,550,302.19
  5. Step 5: Solve for x
    x = 121,941,550,302.19/395,485.47
  6. Step 6: Final answer
    x = 308,333.83

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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.