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Finding the Fourth Proportional to 318,456.78, 477,630.90 and 300,889.50

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Solution

The fourth proportional to 318,456.78, 477,630.90 and 300,889.50 is: 451,282.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,456.78 : 477,630.90 = 300,889.50 : x
  2. Step 2: Convert to fraction form
    318,456.78/477,630.90 = 300,889.50/x
  3. Step 3: Cross multiply
    318,456.78x = 477,630.90 × 300,889.50
  4. Step 4: Simplify right side
    318,456.78x = 143,714,122,685.55
  5. Step 5: Solve for x
    x = 143,714,122,685.55/318,456.78
  6. Step 6: Final answer
    x = 451,282.97

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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.