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Finding the Fourth Proportional to 445,893.96, 668,841.39 and 209,236.86

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Solution

The fourth proportional to 445,893.96, 668,841.39 and 209,236.86 is: 313,855.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,893.96 : 668,841.39 = 209,236.86 : x
  2. Step 2: Convert to fraction form
    445,893.96/668,841.39 = 209,236.86/x
  3. Step 3: Cross multiply
    445,893.96x = 668,841.39 × 209,236.86
  4. Step 4: Simplify right side
    445,893.96x = 139,946,272,281.64
  5. Step 5: Solve for x
    x = 139,946,272,281.64/445,893.96
  6. Step 6: Final answer
    x = 313,855.50

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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.