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Finding the Fourth Proportional to 443,319.70, 664,979.55 and 256,234.90

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Solution

The fourth proportional to 443,319.70, 664,979.55 and 256,234.90 is: 384,352.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,319.70 : 664,979.55 = 256,234.90 : x
  2. Step 2: Convert to fraction form
    443,319.70/664,979.55 = 256,234.90/x
  3. Step 3: Cross multiply
    443,319.70x = 664,979.55 × 256,234.90
  4. Step 4: Simplify right side
    443,319.70x = 170,390,968,496.30
  5. Step 5: Solve for x
    x = 170,390,968,496.30/443,319.70
  6. Step 6: Final answer
    x = 384,352.35

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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.