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Finding the Fourth Proportional to 347,689.20, 521,728.20 and 147,975.60

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Solution

The fourth proportional to 347,689.20, 521,728.20 and 147,975.60 is: 222,046.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,689.20 : 521,728.20 = 147,975.60 : x
  2. Step 2: Convert to fraction form
    347,689.20/521,728.20 = 147,975.60/x
  3. Step 3: Cross multiply
    347,689.20x = 521,728.20 × 147,975.60
  4. Step 4: Simplify right side
    347,689.20x = 77,203,043,431.92
  5. Step 5: Solve for x
    x = 77,203,043,431.92/347,689.20
  6. Step 6: Final answer
    x = 222,046.14

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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.