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Finding the Fourth Proportional to 379,433.64, 523,611.18 and 209,664.12

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Solution

The fourth proportional to 379,433.64, 523,611.18 and 209,664.12 is: 289,332.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,433.64 : 523,611.18 = 209,664.12 : x
  2. Step 2: Convert to fraction form
    379,433.64/523,611.18 = 209,664.12/x
  3. Step 3: Cross multiply
    379,433.64x = 523,611.18 × 209,664.12
  4. Step 4: Simplify right side
    379,433.64x = 109,782,477,276.86
  5. Step 5: Solve for x
    x = 109,782,477,276.86/379,433.64
  6. Step 6: Final answer
    x = 289,332.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.