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Finding the Fourth Proportional to 499,487.20, 749,230.80 and 289,664.80

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Solution

The fourth proportional to 499,487.20, 749,230.80 and 289,664.80 is: 434,497.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,487.20 : 749,230.80 = 289,664.80 : x
  2. Step 2: Convert to fraction form
    499,487.20/749,230.80 = 289,664.80/x
  3. Step 3: Cross multiply
    499,487.20x = 749,230.80 × 289,664.80
  4. Step 4: Simplify right side
    499,487.20x = 217,025,789,835.84
  5. Step 5: Solve for x
    x = 217,025,789,835.84/499,487.20
  6. Step 6: Final answer
    x = 434,497.20

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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.