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Finding the Fourth Proportional to 664,408.40, 996,612.60 and 646,912.40

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Solution

The fourth proportional to 664,408.40, 996,612.60 and 646,912.40 is: 970,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,408.40 : 996,612.60 = 646,912.40 : x
  2. Step 2: Convert to fraction form
    664,408.40/996,612.60 = 646,912.40/x
  3. Step 3: Cross multiply
    664,408.40x = 996,612.60 × 646,912.40
  4. Step 4: Simplify right side
    664,408.40x = 644,721,048,936.24
  5. Step 5: Solve for x
    x = 644,721,048,936.24/664,408.40
  6. Step 6: Final answer
    x = 970,368.60

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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.