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Finding the Fourth Proportional to 395,401.52, 545,649 and 225,638.48

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Solution

The fourth proportional to 395,401.52, 545,649 and 225,638.48 is: 311,378.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,401.52 : 545,649 = 225,638.48 : x
  2. Step 2: Convert to fraction form
    395,401.52/545,649 = 225,638.48/x
  3. Step 3: Cross multiply
    395,401.52x = 545,649 × 225,638.48
  4. Step 4: Simplify right side
    395,401.52x = 123,119,410,973.52
  5. Step 5: Solve for x
    x = 123,119,410,973.52/395,401.52
  6. Step 6: Final answer
    x = 311,378.19

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1.5x scale

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.