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Finding the Fourth Proportional to 664,491.40, 996,737.10 and 440,105.20

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Solution

The fourth proportional to 664,491.40, 996,737.10 and 440,105.20 is: 660,157.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,491.40 : 996,737.10 = 440,105.20 : x
  2. Step 2: Convert to fraction form
    664,491.40/996,737.10 = 440,105.20/x
  3. Step 3: Cross multiply
    664,491.40x = 996,737.10 × 440,105.20
  4. Step 4: Simplify right side
    664,491.40x = 438,669,180,742.92
  5. Step 5: Solve for x
    x = 438,669,180,742.92/664,491.40
  6. Step 6: Final answer
    x = 660,157.80

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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.