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Finding the Fourth Proportional to 561,946.20, 842,919.30 and 321,813.60

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Solution

The fourth proportional to 561,946.20, 842,919.30 and 321,813.60 is: 482,720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,946.20 : 842,919.30 = 321,813.60 : x
  2. Step 2: Convert to fraction form
    561,946.20/842,919.30 = 321,813.60/x
  3. Step 3: Cross multiply
    561,946.20x = 842,919.30 × 321,813.60
  4. Step 4: Simplify right side
    561,946.20x = 271,262,894,442.48
  5. Step 5: Solve for x
    x = 271,262,894,442.48/561,946.20
  6. Step 6: Final answer
    x = 482,720.40

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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.