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Finding the Fourth Proportional to 291,704.40, 437,902.20 and 289,630.80

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Solution

The fourth proportional to 291,704.40, 437,902.20 and 289,630.80 is: 434,789.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,704.40 : 437,902.20 = 289,630.80 : x
  2. Step 2: Convert to fraction form
    291,704.40/437,902.20 = 289,630.80/x
  3. Step 3: Cross multiply
    291,704.40x = 437,902.20 × 289,630.80
  4. Step 4: Simplify right side
    291,704.40x = 126,829,964,507.76
  5. Step 5: Solve for x
    x = 126,829,964,507.76/291,704.40
  6. Step 6: Final answer
    x = 434,789.34

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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.