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Finding the Fourth Proportional to 347,276.80, 520,915.20 and 189,812.80

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Solution

The fourth proportional to 347,276.80, 520,915.20 and 189,812.80 is: 284,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,276.80 : 520,915.20 = 189,812.80 : x
  2. Step 2: Convert to fraction form
    347,276.80/520,915.20 = 189,812.80/x
  3. Step 3: Cross multiply
    347,276.80x = 520,915.20 × 189,812.80
  4. Step 4: Simplify right side
    347,276.80x = 98,876,372,674.56
  5. Step 5: Solve for x
    x = 98,876,372,674.56/347,276.80
  6. Step 6: Final answer
    x = 284,719.20

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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.