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Finding the Fourth Proportional to 347,404.20, 521,300.70 and 147,690.60

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Solution

The fourth proportional to 347,404.20, 521,300.70 and 147,690.60 is: 221,618.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,404.20 : 521,300.70 = 147,690.60 : x
  2. Step 2: Convert to fraction form
    347,404.20/521,300.70 = 147,690.60/x
  3. Step 3: Cross multiply
    347,404.20x = 521,300.70 × 147,690.60
  4. Step 4: Simplify right side
    347,404.20x = 76,991,213,163.42
  5. Step 5: Solve for x
    x = 76,991,213,163.42/347,404.20
  6. Step 6: Final answer
    x = 221,618.54

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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.