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Finding the Fourth Proportional to 478,445.40, 717,668.10 and 411,960.60

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Solution

The fourth proportional to 478,445.40, 717,668.10 and 411,960.60 is: 617,940.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,445.40 : 717,668.10 = 411,960.60 : x
  2. Step 2: Convert to fraction form
    478,445.40/717,668.10 = 411,960.60/x
  3. Step 3: Cross multiply
    478,445.40x = 717,668.10 × 411,960.60
  4. Step 4: Simplify right side
    478,445.40x = 295,650,981,076.86
  5. Step 5: Solve for x
    x = 295,650,981,076.86/478,445.40
  6. Step 6: Final answer
    x = 617,940.90

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Similar ratio
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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.