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Finding the Fourth Proportional to 321,484.80, 443,659.50 and 178,258.20

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Solution

The fourth proportional to 321,484.80, 443,659.50 and 178,258.20 is: 246,002.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,484.80 : 443,659.50 = 178,258.20 : x
  2. Step 2: Convert to fraction form
    321,484.80/443,659.50 = 178,258.20/x
  3. Step 3: Cross multiply
    321,484.80x = 443,659.50 × 178,258.20
  4. Step 4: Simplify right side
    321,484.80x = 79,085,943,882.90
  5. Step 5: Solve for x
    x = 79,085,943,882.90/321,484.80
  6. Step 6: Final answer
    x = 246,002.12

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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.