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Finding the Fourth Proportional to 664,490.40, 996,735.60 and 440,104.20

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Solution

The fourth proportional to 664,490.40, 996,735.60 and 440,104.20 is: 660,156.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,490.40 : 996,735.60 = 440,104.20 : x
  2. Step 2: Convert to fraction form
    664,490.40/996,735.60 = 440,104.20/x
  3. Step 3: Cross multiply
    664,490.40x = 996,735.60 × 440,104.20
  4. Step 4: Simplify right side
    664,490.40x = 438,667,523,849.52
  5. Step 5: Solve for x
    x = 438,667,523,849.52/664,490.40
  6. Step 6: Final answer
    x = 660,156.30

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Double scale
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Similar ratio
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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.