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Finding the Fourth Proportional to 457,441.61, 686,162.27 and 221,245.61

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Solution

The fourth proportional to 457,441.61, 686,162.27 and 221,245.61 is: 331,868.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,441.61 : 686,162.27 = 221,245.61 : x
  2. Step 2: Convert to fraction form
    457,441.61/686,162.27 = 221,245.61/x
  3. Step 3: Cross multiply
    457,441.61x = 686,162.27 × 221,245.61
  4. Step 4: Simplify right side
    457,441.61x = 151,810,387,107.44
  5. Step 5: Solve for x
    x = 151,810,387,107.44/457,441.61
  6. Step 6: Final answer
    x = 331,868.34

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.