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Finding the Fourth Proportional to 443,894.40, 665,404.20 and 219,070.80

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Solution

The fourth proportional to 443,894.40, 665,404.20 and 219,070.80 is: 328,390.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,894.40 : 665,404.20 = 219,070.80 : x
  2. Step 2: Convert to fraction form
    443,894.40/665,404.20 = 219,070.80/x
  3. Step 3: Cross multiply
    443,894.40x = 665,404.20 × 219,070.80
  4. Step 4: Simplify right side
    443,894.40x = 145,770,630,417.36
  5. Step 5: Solve for x
    x = 145,770,630,417.36/443,894.40
  6. Step 6: Final answer
    x = 328,390.33

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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.