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Finding the Fourth Proportional to 320,426.20, 480,120.90 and 201,885.40

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Solution

The fourth proportional to 320,426.20, 480,120.90 and 201,885.40 is: 302,501.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,426.20 : 480,120.90 = 201,885.40 : x
  2. Step 2: Convert to fraction form
    320,426.20/480,120.90 = 201,885.40/x
  3. Step 3: Cross multiply
    320,426.20x = 480,120.90 × 201,885.40
  4. Step 4: Simplify right side
    320,426.20x = 96,929,399,944.86
  5. Step 5: Solve for x
    x = 96,929,399,944.86/320,426.20
  6. Step 6: Final answer
    x = 302,501.48

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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.