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Finding the Fourth Proportional to 321,308.76, 443,406.08 and 178,090.32

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Solution

The fourth proportional to 321,308.76, 443,406.08 and 178,090.32 is: 245,764.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,308.76 : 443,406.08 = 178,090.32 : x
  2. Step 2: Convert to fraction form
    321,308.76/443,406.08 = 178,090.32/x
  3. Step 3: Cross multiply
    321,308.76x = 443,406.08 × 178,090.32
  4. Step 4: Simplify right side
    321,308.76x = 78,966,330,677.15
  5. Step 5: Solve for x
    x = 78,966,330,677.15/321,308.76
  6. Step 6: Final answer
    x = 245,764.64

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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.