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Finding the Fourth Proportional to 561,940.20, 842,910.30 and 321,807.60

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Solution

The fourth proportional to 561,940.20, 842,910.30 and 321,807.60 is: 482,711.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,940.20 : 842,910.30 = 321,807.60 : x
  2. Step 2: Convert to fraction form
    561,940.20/842,910.30 = 321,807.60/x
  3. Step 3: Cross multiply
    561,940.20x = 842,910.30 × 321,807.60
  4. Step 4: Simplify right side
    561,940.20x = 271,254,940,658.28
  5. Step 5: Solve for x
    x = 271,254,940,658.28/561,940.20
  6. Step 6: Final answer
    x = 482,711.40

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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.