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Finding the Fourth Proportional to 347,628.20, 520,664.70 and 285,420.20

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Solution

The fourth proportional to 347,628.20, 520,664.70 and 285,420.20 is: 427,491.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,628.20 : 520,664.70 = 285,420.20 : x
  2. Step 2: Convert to fraction form
    347,628.20/520,664.70 = 285,420.20/x
  3. Step 3: Cross multiply
    347,628.20x = 520,664.70 × 285,420.20
  4. Step 4: Simplify right side
    347,628.20x = 148,608,222,806.94
  5. Step 5: Solve for x
    x = 148,608,222,806.94/347,628.20
  6. Step 6: Final answer
    x = 427,491.85

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1.5x scale

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.