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Finding the Fourth Proportional to 395,487.35, 545,820.47 and 223,412.57

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Solution

The fourth proportional to 395,487.35, 545,820.47 and 223,412.57 is: 308,336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,487.35 : 545,820.47 = 223,412.57 : x
  2. Step 2: Convert to fraction form
    395,487.35/545,820.47 = 223,412.57/x
  3. Step 3: Cross multiply
    395,487.35x = 545,820.47 × 223,412.57
  4. Step 4: Simplify right side
    395,487.35x = 121,943,151,790.74
  5. Step 5: Solve for x
    x = 121,943,151,790.74/395,487.35
  6. Step 6: Final answer
    x = 308,336.42

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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.