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Finding the Fourth Proportional to 395,391.12, 545,678.88 and 225,650.76

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Solution

The fourth proportional to 395,391.12, 545,678.88 and 225,650.76 is: 311,420.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,391.12 : 545,678.88 = 225,650.76 : x
  2. Step 2: Convert to fraction form
    395,391.12/545,678.88 = 225,650.76/x
  3. Step 3: Cross multiply
    395,391.12x = 545,678.88 × 225,650.76
  4. Step 4: Simplify right side
    395,391.12x = 123,132,853,987.95
  5. Step 5: Solve for x
    x = 123,132,853,987.95/395,391.12
  6. Step 6: Final answer
    x = 311,420.38

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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.