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Finding the Fourth Proportional to 664,614.40, 996,921.60 and 265,316.80

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Solution

The fourth proportional to 664,614.40, 996,921.60 and 265,316.80 is: 397,975.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,614.40 : 996,921.60 = 265,316.80 : x
  2. Step 2: Convert to fraction form
    664,614.40/996,921.60 = 265,316.80/x
  3. Step 3: Cross multiply
    664,614.40x = 996,921.60 × 265,316.80
  4. Step 4: Simplify right side
    664,614.40x = 264,500,048,762.88
  5. Step 5: Solve for x
    x = 264,500,048,762.88/664,614.40
  6. Step 6: Final answer
    x = 397,975.20

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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.