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Finding the Fourth Proportional to 395,889.46, 545,594.78 and 281,173.12

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Solution

The fourth proportional to 395,889.46, 545,594.78 and 281,173.12 is: 387,498.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,889.46 : 545,594.78 = 281,173.12 : x
  2. Step 2: Convert to fraction form
    395,889.46/545,594.78 = 281,173.12/x
  3. Step 3: Cross multiply
    395,889.46x = 545,594.78 × 281,173.12
  4. Step 4: Simplify right side
    395,889.46x = 153,406,586,548.31
  5. Step 5: Solve for x
    x = 153,406,586,548.31/395,889.46
  6. Step 6: Final answer
    x = 387,498.54

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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.