Home / 664,421.20-996,631.80-613,099.60

Finding the Fourth Proportional to 664,421.20, 996,631.80 and 613,099.60

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Solution

The fourth proportional to 664,421.20, 996,631.80 and 613,099.60 is: 919,649.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,421.20 : 996,631.80 = 613,099.60 : x
  2. Step 2: Convert to fraction form
    664,421.20/996,631.80 = 613,099.60/x
  3. Step 3: Cross multiply
    664,421.20x = 996,631.80 × 613,099.60
  4. Step 4: Simplify right side
    664,421.20x = 611,034,557,927.28
  5. Step 5: Solve for x
    x = 611,034,557,927.28/664,421.20
  6. Step 6: Final answer
    x = 919,649.40

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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.