Home / 664,986.20-997,479.30-613,664.60

Finding the Fourth Proportional to 664,986.20, 997,479.30 and 613,664.60

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Solution

The fourth proportional to 664,986.20, 997,479.30 and 613,664.60 is: 920,496.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,986.20 : 997,479.30 = 613,664.60 : x
  2. Step 2: Convert to fraction form
    664,986.20/997,479.30 = 613,664.60/x
  3. Step 3: Cross multiply
    664,986.20x = 997,479.30 × 613,664.60
  4. Step 4: Simplify right side
    664,986.20x = 612,117,735,642.78
  5. Step 5: Solve for x
    x = 612,117,735,642.78/664,986.20
  6. Step 6: Final answer
    x = 920,496.90

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Half scale
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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.