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Finding the Fourth Proportional to 331,713.41, 457,300.73 and 280,520.30

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Solution

The fourth proportional to 331,713.41, 457,300.73 and 280,520.30 is: 386,725.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,713.41 : 457,300.73 = 280,520.30 : x
  2. Step 2: Convert to fraction form
    331,713.41/457,300.73 = 280,520.30/x
  3. Step 3: Cross multiply
    331,713.41x = 457,300.73 × 280,520.30
  4. Step 4: Simplify right side
    331,713.41x = 128,282,136,384.62
  5. Step 5: Solve for x
    x = 128,282,136,384.62/331,713.41
  6. Step 6: Final answer
    x = 386,725.80

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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.