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Finding the Fourth Proportional to 321,280.56, 443,355.12 and 178,036.92

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Solution

The fourth proportional to 321,280.56, 443,355.12 and 178,036.92 is: 245,684.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,280.56 : 443,355.12 = 178,036.92 : x
  2. Step 2: Convert to fraction form
    321,280.56/443,355.12 = 178,036.92/x
  3. Step 3: Cross multiply
    321,280.56x = 443,355.12 × 178,036.92
  4. Step 4: Simplify right side
    321,280.56x = 78,933,580,031.03
  5. Step 5: Solve for x
    x = 78,933,580,031.03/321,280.56
  6. Step 6: Final answer
    x = 245,684.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.