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Finding the Fourth Proportional to 395,017.56, 545,121.90 and 225,248.04

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Solution

The fourth proportional to 395,017.56, 545,121.90 and 225,248.04 is: 310,840.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,017.56 : 545,121.90 = 225,248.04 : x
  2. Step 2: Convert to fraction form
    395,017.56/545,121.90 = 225,248.04/x
  3. Step 3: Cross multiply
    395,017.56x = 545,121.90 × 225,248.04
  4. Step 4: Simplify right side
    395,017.56x = 122,787,639,536.08
  5. Step 5: Solve for x
    x = 122,787,639,536.08/395,017.56
  6. Step 6: Final answer
    x = 310,840.96

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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.