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Finding the Fourth Proportional to 320,215.38, 480,401.90 and 225,630.28

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Solution

The fourth proportional to 320,215.38, 480,401.90 and 225,630.28 is: 338,500.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,215.38 : 480,401.90 = 225,630.28 : x
  2. Step 2: Convert to fraction form
    320,215.38/480,401.90 = 225,630.28/x
  3. Step 3: Cross multiply
    320,215.38x = 480,401.90 × 225,630.28
  4. Step 4: Simplify right side
    320,215.38x = 108,393,215,209.53
  5. Step 5: Solve for x
    x = 108,393,215,209.53/320,215.38
  6. Step 6: Final answer
    x = 338,500.97

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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.