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Finding the Fourth Proportional to 478,934, 718,404.60 and 212,622.80

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Solution

The fourth proportional to 478,934, 718,404.60 and 212,622.80 is: 318,935.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,934 : 718,404.60 = 212,622.80 : x
  2. Step 2: Convert to fraction form
    478,934/718,404.60 = 212,622.80/x
  3. Step 3: Cross multiply
    478,934x = 718,404.60 × 212,622.80
  4. Step 4: Simplify right side
    478,934x = 152,749,197,584.88
  5. Step 5: Solve for x
    x = 152,749,197,584.88/478,934
  6. Step 6: Final answer
    x = 318,935.80

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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.